The family of private detective Daniel Morgan has called for a judicial inquiry after his multi-million pound murder case collapsed on the 24th anniversary of his death.

Their call came as a senior Scotland Yard detective admitted that police corruption damaged the investigation.
Mr Morgan, 37, was found with an axe in his head in a south-east London pub car park on 10 March 1987.
No-one has been brought to justice despite five police inquiries.
Mr Morgan's family said: "The criminal justice system is not fit for purpose."
Metropolitan Police (Met) Det Ch Supt Hamish Campbell said: "This current investigation has identified, ever more clearly, how the initial inquiry failed the family and wider public.
"It is quite apparent that police corruption was a debilitating factor in that investigation. This was wholly unacceptable."
The case has become one of Britain's longest unsolved murders.
Unofficial estimates put the cost of five police inquiries and three years of legal hearings at about Â£30m.
Mr Morgan, a father-of-two from Monmouthshire, was found with an axe embedded in his skull outside the Golden Lion pub in Sydenham, south-east London.
Five people were arrested in 2008 but two, including a former detective accused of perverting the course of justice, were discharged after a string of supergrasses were discredited.
The Crown Prosecution Service has now dropped the case against the remaining three people - Mr Morgan's former business partner Jonathan Rees and brothers Garry and Glenn Vian.
Mr Morgan's brother Alastair, 62, said: "My family is devastated by this news.
"We put some flowers on the grave. It's just horrible."
He said he believed there had been a number of police cover-ups over the years and alleged his brother was murdered because he was about to expose police corruption.
By Chris SummersBBC News
Behind the headline figure of Â£30m spent on a police investigation and legal expenses is the human cost.
In the early 1990s, while working on a weekly newspaper, I met Daniel Morgan's brother, Alastair, who came in to do work experience.  Over the years I have spoken to him several times.
He and his elderly mother, Isobel, will be devastated at this latest turn of events.
The trial was due to start last year  but was delayed by legal argument as the defence sought more disclosure about the evidence.
As witness after witness was undermined and more and more was disclosed about the police investigation, prosecutor Nicholas Hilliard QC resembled a man carrying a box full of sand with a hole in the bottom.
Reporters at the Old Bailey were unable to report any of the proceedings until now because of the increasingly slim chance that a trial would take place in the spring.
Now the CPS has finally thrown the towel in and the mystery of who killed Daniel Morgan will remain unsolved.
"It was obvious my brother was going to blow the lid off the links between the police and criminals," he added.
A family spokesman said: "His family have seen that the criminal justice system is simply not fit for purpose to address the crime with which they have been required to live over the last two-and-a-half decades.
"So they have been left with no option but to call upon the Home Secretary today to order a full judicial inquiry into the handling of the case by the Metropolitan Police and the Crown Prosecution Service (CPS)."
Alastair Morgan added: "For almost a quarter of a century, my family has done everything democratically and legally possible to secure justice for Daniel.
"For much of this time, we have encountered stubborn obstruction, and worse, at the highest levels of the Metropolitan Police.
"We have found an impotent police complaints system.
"And we have met with inertia, or worse, on the part of successive governments.
"We have been failed utterly by all of the institutions designed to protect us."
But he said those responsible for the present inquiry and prosecution had done their best "to redress the catastrophic failures of earlier investigations".
Mr Rees, 56, Garry Vian, 50, and his brother Glenn, 52, all denied murder.
Their associate James Cook was freed in November last year and former detective sergeant Sid Fillery, 63, was discharged in February last year.
Outside court, Mr Rees said: "I should never have been prosecuted."
"My sympathy goes out to Danny Morgan's family," he added.
Len Duvall, former chairman of the Metropolitan Police Authority, said officers had been working hard to rectify the force's "wrongs".
"I am in no doubt that if this terrible crime had been committed today, the perpetrators would have been brought to justice," he added.
Det Ch Supt Campbell said: "There are important issues which we need to examine now in order to understand what led to today's decision."
The family was behind the current investigation by hand-picked Scotland Yard officers.
But the case collapsed before a jury was sworn in.
The CPS statement said: "We have decided that a prosecution cannot continue in these circumstances. We cannot be confident that the defence necessarily have all of the material that they are entitled to.
"This point would be raised by the defence during any trial, so we are no longer satisfied that there is sufficient evidence for a realistic prospect of conviction."
A Home Office spokesperson said: "It is deeply regrettable that, after so long, Daniel Morgan's killers have not been brought to justice.
"The Metropolitan Police inquiry remains open."
The case throws up serious questions about the use of supergrass deals which offer reductions in sentences in return for evidence, and the offer of rewards.
Underworld figures had volunteered to give evidence after a Â£50,000 reward was offered.
One had a lengthy prison term reduced after agreeing to be a prosecution witness.


Oscar-winning actress Brie Larson is to direct her first feature film, a comedy called Unicorn Store.

The Room star will also produce and star in the movie, which will begin filming in October, Variety reports.
The film is about a woman called Kit who moves back in with her parents and then receives a mysterious invitation.
Larson previously co-wrote and co-directed short film The Arm, which won the jury prize at the Sundance Film Festival in 2012.
Unicorn Store is based on an original screenplay by Samantha McIntyre.
The project was originally to have been directed by Miguel Arteta, with Rebel Wilson set to star, but the timing didn't work out, according to the Hollywood Reporter.
Larson's other upcoming acting work includes Kong: Skull Island, the Captain Marvel movie, coming-of-age drama The Glass Castle and Ben Wheatley crime thriller Free Fire.
She was awarded the Academy Award for best actress earlier this year for her portrayal of a young mother held captive with her five-year-old son Jack (Jacob Tremblay) in Room.
When preparing for her role, Larson decided to isolate herself from the outside world.
"I stayed at home for a month," the US actress explained. "I was excited to see what would come up if I tuned out for a while."
Follow us on Twitter @BBCNewsEnts, on Instagram, or email entertainment.news@bbc.co.uk.


It's two years since 276 girls were kidnapped from their school in Nigeria in west Africa by an extreme Islamist group called Boko Haram.

14 April 2016 Last updated at 08:24 BST
Today campaigners are still fighting for the girls to be rescued, and for all schools to be a place of safety for students.
The event in the town of Chibok in 2014 shocked the world.
Many people came together to support the campaign to find them called #BringBackOurGirls including Michelle Obama and Malala Yousafzai.
Since then, 57 girls have escaped, but 219 are still missing.
There's now no secondary school in Chibok or the surrounding villages some children now go to schools further away but many can't afford to do that.
The campaigners are hoping that by remembering the missing girls they can can remind people of the campaign to rescue them and fight for an education for all children in Nigeria.
Advice if you're upset by the news


Ambulance bosses have apologised after a man who severed part of his finger in Denbighshire had to wait over an hour for a taxi to get him to hospital.

The incident happened near the Hand Hotel, Llangollen, on Saturday.
The Welsh Ambulance Service said an assessment was made over the telephone before the taxi was arranged.
Sonia Thompson, head of operations in north Wales, said the use of taxis in "appropriate cases" allowed ambulances to be deployed elsewhere.
"We are sorry for the wait this patient experienced and for any discomfort it may have caused him," she said.
The wait for ambulance assistance prompted criticisms from people on the Facebook group, Llangollen notice board.
It is understood the man had been on holiday with a group of off-road bikers when the incident happened as he was loading his bike on to a van.


Most of us can only imagine what it might have been like.

For the majority of football clubs across Scotland, you would have to be at least in your 70s to really remember their record attendance game.
A combination of safety regulations and competing attractions means such crowds will never be seen again.
But how was the match experience in the days when the whole town turned out to watch their team? John Paterson, from Dumfries, is lucky enough to know.
A lifelong Queen of the South fan, he was a teenager when he and 26,551 others packed into Palmerston Park for the visit of Hearts for a Scottish Cup tie in February 1952.
He had first gone to see the Doonhamers with his father in August 1945 when they beat Hibs 3-0 and he has been "hooked ever since".
"In those days you had nine, 10, 11 thousand people going to the game - a poor gate was about 8,000," he said.
"But then again, there was nothing else, TV was just in its infancy and there was no Saturday afternoon sports coverage or anything like that.
"To go to Palmerston, walking down Buccleuch Street across Buccleuch Street bridge it was just a hoard of folk going there and then a hoard of folk coming back.
"For anybody trying to go in the opposite direction, it was impossible."
Queens had won promotion in the summer of 1951 back into the top division of Scottish football and there was optimism about their chances against a strong Hearts side.
"I think from memory we had drawn with Hearts 1-1 the week before and we turned up at this all-ticket game at Palmerston with a monster crowd," said Mr Paterson.
"It was amazing to see, there was hardly any room in the park. It was just an amazing day."
He watched from the left hand side of the main stand with high hopes that the south of Scotland outfit could get a result.
This was a side which the 80-year-old rates as "without question" the best Queen of the South team he has ever seen.
They boasted goalkeeper Roy Henderson - voted the club's greatest ever player in a newspaper poll nearly 50 years after his career ended - and record goalscorer Jim Patterson, as well as Scotland international Billy Houliston.
"They were a formidable team," said Mr Paterson.
"The atmosphere was phenomenal, it was the first big game that I had been to," he said.
"I had been to a semi-final against Rangers at Hampden but this was in Palmerston and you didn't know how many people were going to turn up and 26,500 turned up.
"The Terregles Street end was absolutely packed, Portland Road end you couldn't move and the Coo Shed was full to the gunnels.
"Kids were allowed to sit inside the track."
The game itself proved a step too far for Queens, they slipped two goals behind and, although they pulled one back, ended up suffering a 3-1 defeat.
"We anticipated we would be able to do something," said Mr Paterson.
"All football fans think their club can do it on the day.
"It was an anticlimax on the day but the atmosphere was fantastic.
"Maybe the occasion got to us, we hadn't played in front of 26,000 folk before - maybe that had something to do with it, I don't know."
Like any football fan, Mr Paterson gets a little nostalgic thinking about those times.
"It was a simple game, they played with two full-backs, three midfield and five forwards - with the two inside forwards being the powerhouse, running back and forward - and two wingers, Bobby Black on one and Jackie Oakes on the other," he said.
"It's the most attacking type of football, wingers get the ball, race to the corner flag, cut the ball across for somebody running onto it."
However, his passion for the game has not dimmed over the years.
"You just lived from one Saturday to the next," he said.
"Unfortunately - maybe that's not the right word - it is the same now.
"I still live from Saturday to Saturday and I still get a buzz on a Saturday when I know I am going to be watching Queens and I get a lot of pleasure out of watching them.
"Folk think I'm daft. If Queens are playing and I can feasibly get there, that's where I will be."
It is a love for the Doonhamers which he has transmitted to his family.
"I took my son when I think he was seven years old to his first game, now he is vice-chairman of the club," he said.
"And his two sons, my grandsons, are there every Saturday home and away."
One thing they won't see, however, is a crowd like their father and grandfather saw inside the confines of Palmerston Park.
"For health and safety reasons you can't get more than about 8,700 I think," said Mr Paterson.
"We are never going to draw those kind of attendances on a regular basis, unfortunately.
"If we could do that we could possibly see ourselves improving and being able to compete at a higher level."
Last season's average attendance was just a little over 2,000, which means every single one of them would have had to take a dozen friends in order to match the club's record crowd.
We modern day supporters must accept that we will never know that kind of atmosphere.
But we can still take time out to talk to fans like John Paterson to get a flavour of what it was like to be there.
Did you or a close member of your family attend your club's record attendance game? Share your memories of the day or what they told you about it via email togiancarlo.rinaldi@bbc.co.uk.


US President Barack Obama has warned Syrian President Bashar al-Assad he will face "consequences" if he uses chemical weapons against his people.

"The world is watching. The use of chemical weapons is and would be totally unacceptable," said Mr Obama.
A Syrian official has insisted it would "never, under any circumstances" use such weapons, "if such weapons exist".
Meanwhile, the United Nations says it is pulling "all non-essential international staff" out of Syria.
As many as 25 out of 100 international staff could leave this week, the UN news agency Irin reported, while all humanitarian missions outside Damascus will be halted for the time being.
In a speech on nuclear non-proliferation at the National Defense University in Fort McNair, Mr Obama said: "We've worked to keep weapons from spreading, whether it was nuclear material in Libya or nor chemical weapons in Syria.
Sources: CSIS, RUSI
Could US remove Syria chemical weapons?
"We simply cannot allow the 21st century to be darkened by the worse weapons of the 20th century."
"And today I want to make it absolutely clear to Assad and anyone who is under his command... If you make the tragic mistake of using these weapons there will be consequences and you will be held accountable."
But Damascus rejected allegations it was preparing to use such weapons.
A foreign ministry spokesman was quoted by state television as saying: "Syria confirms repeatedly it will never, under any circumstances, use chemical weapons against its own people, if such weapons exist."
Syria is believed to hold chemical weapons - including mustard gas and sarin, a highly toxic nerve agent - at dozens of sites around the country.
The CIA has said those weapons "can be delivered by aircraft, ballistic missile, and artillery rockets".
One unnamed US official spoke to the New York Times of "potential chemical weapon preparation".
The White House says the level of concern was such that Washington is preparing contingency plans.
By Kim GhattasBBC News, Washington
The Obama administration is concerned about the possibility that the Assad government might use chemical weapons in last desperate stand. But the US is just as worried about the weapons falling in the wrong heads if central authority collapses.
Washington has been working on contingency planning since the summer, when Mr Obama first warned that Syria's use of chemical weapons would cross a red line and could change his calculus about intervention. The US has been co-ordinating with allies in the region like Jordan and Israel about plans to secure the weapons in the event Mr Assad falls.
Although the US will not give details about its planning, it's thought that securing the sites would require thousands of ground troops. The state department also said the US is speaking to the Syrian opposition about how the rebels should handle and help secure the WMDs if they gain access to them.
The crisis in Syria had increased the risk of humanitarian workers in the country due to the increased risk of indiscriminate shooting by fighting forces., said Sabir Mughal, the UN's chief security adviser in Syria.
The European Union, which has a diplomatic office in the Syrian capital, has confirmed it too is "to reduce activities in Damascus to a minimum level due to the current security conditions".
Earlier, Egypt Air ordered the return of a flight on its way to Damascus amid reports of a "bad security situation" around the airport - only a day after ending its suspension of flights following violence around the airport and in the capital's suburbs last week.
Syrian Foreign Ministry spokesman Jihad Makdissi is reported to have already left the country, even before reports that he had been dismissed, ostensibly for making statements out of line with government policy.
Rebels have been making gains on the ground, and the head of the Arab League has said the Syrian government could fall at any moment, the BBC's Jim Muir reports from Beirut.
But it still holds the capital, parts of the second city Aleppo, and other centres and one diplomat said it still has a lot of fight left in it.
Intelligence that the Syrian government was contemplating the use of the missiles is what led neighbouring Turkey to request Nato Patriot missile defences along its borders, Turkish officials were quoted as saying on Sunday.
Several Syrian mortar shells - aimed at rebel targets close to the border - have landed in Turkish territory in recent weeks, leading Ankara to ask Nato for the deployment of the sophisticated anti-missile batteries.
But Russian President Vladimir Putin, after talks with Turkish Prime Minister Recep Tayyip Erdogan in Istanbul on Monday, warned against such a move, fearing it would "exacerbate" rather than "defuse" tensions on the border.
Moscow has remained a key ally of Syria during the 22-month conflict, while Ankara now backs the rebels trying to oust President Assad.
There was no breakthrough on how to "regulate the situation" in Syria, said Mr Putin, while emphasising that the Turkish and Russian "assessment of the situation completely coincides".
"We are not advocates of the incumbent Syrian leadership," he said.


A 54-year-old man arrested on suspicion of murder over a fatal stabbing in Lancashire has been released without charge, police have said.

He was arrested in connection with the stab death of Ian Dollery, 51, who was found on York Road, near Royal Lytham and St Annes Golf Club, on Thursday.
Police said a 47-year-old man, who was also arrested, is in a secure unit pending a mental health assessment.
A post-mortem examination said Mr Dollery died of multiple stab wounds.


Jazz Carlin experienced huge relief and joy after realising her Olympic dream with her third British title in a week.

Media playback is not supported on this device
The Welsh swimmer achieved the qualifying standard for the 400 metres freestyle with a time of four minutes 4.33 seconds in Glasgow.
Carlin had won the 200m and 800m earlier in the week, but her final swim proved decisive.
"I did it on the last swim, so I left it a bit late but I couldn't be any happier right now," she said.
Carlin secured her berth in Rio along with Siobhan-Marie O'Connor and Ben Proud on the third day of the British Championships.
The 25-year-old, who failed to qualify for London 2012 after illness interrupted her preparations, said: "I was trying not to focus on the time too much.
"I was trying to relax and enjoy the race, enjoy the atmosphere, enjoy the Olympic trials, whereas towards the start of the week I was stressing myself out, being so tense and really moody with everyone around me."
Carlin acknowledged her 2012 heartbreak had pushed her on.
"I watched the Olympics. I had a month or so out of the water and I thought 'you know, I can give this one more shot'," she said.
"It was amazing to watch the GB swimmers race but I don't want to watch on the sidelines - I want to be there as part of the Olympics.
"There's a saying that failure pushes you to success and I've really used that, the real lows, to bring me up to where I am now.
"This week has been tough. I have really put pressure on myself, so it feels like a massive weight has been lifted off my shoulders."


The UK could be "cut off" from an EU-wide crime and security database after Brexit, the Liberal Democrats have warned.

The party's Brexit spokesman Nick Clegg said losing access to the Schengen Information System (SIS) would be "Euroscepticism gone mad".
The SIS allows police across Europe to access information on criminals and terrorists.
The Conservatives said the Lib Dems were "peddling nonsense".
Under the SIS, which the UK joined in 2015, police and border forces in EU member states and four "associated countries" enter and receive alerts about wanted and missing people, as well as potential witnesses and items that could be used as evidence.
Both the UK and EU backed close cooperation on security matters when they outlined their Brexit negotiating strategies.
In the document setting out its negotiation aims, the government lists the SIS as an example of the "mutually beneficial model of cooperation" in the fight against crime and terrorism.
It said the UK would "continue to cooperate closely with our European partners" on security matters, and  "negotiate the best deal we can with the EU to cooperate in the fight against crime and terrorism".
But Mr Clegg said the UK would be "severing our ties" with the system by refusing to accept rulings of the European Court of Justice after Brexit.
"It is hard to overstate the importance of this database," said Mr Clegg, the former deputy prime minister.
"We check it 16 times a second, looking for security threats that have been flagged to us by other European countries. And we use it to tell other countries to stop and question people who we think are potential terrorists."
He added: "If she fails to back down, Theresa May's approach to Brexit poses a direct threat to our national security," he said.
The SIS is in use across the borderless Schengen area, with special arrangements for countries - like the UK - that are not part of the passport-free zone.
A Conservative spokesman said: "The Lib Dems are peddling nonsense - we've made clear that under Theresa May security cooperation will be an important priority in the negotiations, and it's not in the EU's interest to lessen that relationship."


The US is to step up its support for the Syrian opposition as it fights to topple President Bashar al-Assad, Secretary of State John Kerry says.

Mr Kerry said the US would provide direct support to rebel forces in the form of medical and food supplies.
He also promised an additional $60m (Â£40m) in aid to the opposition to help it deliver basic governance and other services in rebel-controlled areas.
Mr Kerry was speaking at a gathering of the Friends of Syria group in Rome.
On Friday he is travelling to Ankara to discuss the Syria crisis with top Turkish officials.
The promise of direct, non-lethal aid to the rebels represents a shift in US policy on Syria, correspondents say.
However it falls short of providing the weapons and munitions that the rebels say they need to defeat government forces.
Mr Kerry said the decision was designed to increase the pressure on President Assad to step down and allow a democratic transition.
"The US decision to take further steps now is the result of the brutality of superior armed force propped up by foreign fighters from Iran and Hezbollah.
"President Assad is out of time and must be out of power," said Mr Kerry, adding that the Syrian leader could not "shoot his way out" of the situation.
The $60m in aid to the opposition Syrian National Coalition (SNC) represents a doubling of US support.
It was intended to help the opposition deliver governance and basic services in rebel-controlled areas, said Mr Kerry.
"As the regime continues to lose ground it will help the opposition extend stability and build representative government and the rule of law," he added.
By Jonathan MarcusBBC diplomatic correspondent
The signals are clear. Diplomatic patience is running out and the international calculus is slowly shifting.
The debate on arming the Syrian opposition is not going to go away. Non-lethal military aid looks to be the next step for some governments.
The problem is that the arming debate is no simple one. More weapons may even up the contest but equally could increase the bloodshed in the short term.
How could weapons be kept out of the hands of extremist Islamist groups? And is it really true, as some have argued, that supplying weaponry will boost the influence of Western governments among groups that will have a key role in any post-Assad Syria?
One reason the diplomatic clock has been moving so slowly is, in fairness, that while terrible events have been taking place on the ground, there are probably no easy diplomatic answers to be found.
Frustration forces Western shift on Syria
After the meeting, the European Union announced changes to its arms embargo on Syria, allowing EU states to provide armoured vehicles, non-lethal military equipment and technical aid to the rebels, but not weapons.
At the meeting with Mr Kerry, leader of the SNC, Moaz al-Khatib, said he was still frustrated by the lack of military help for rebel fighters.
He initially refused to attend the Rome talks in protest at a lack of international support for the Syrian rebels, but was persuaded after the US and UK indicated there would be specific promises of aid.
Speaking at the meeting Mr Khatib called on President Assad to make "one wise decision in your life" and stand down "for the future of your country".
Earlier this month he also suggested for the first time that talks with the Assad government might be possible, though that suggestion remains controversial among opposition groups.
The SNC says it plans to set up a government to administer rebel-held areas of Syria, primarily in the north of the country close to the Turkish border.
But a meeting to select the prime minister, scheduled for the weekend, was unexpectedly postponed on Thursday, and no new date has been set.
Meanwhile fighting in Syria continues and the humanitarian situation is worsening.
In the latest fighting, rebel forces have captured the historic Umayyad Mosque in Aleppo, according to an activist group.
The mosque was damaged and its museum caught fire as rebels forced government troops to withdraw, UK-based activist group the Syrian Observatory for Human Rights said.
Fighting also raged elsewhere in Aleppo's old city, including near the Palace of Justice, it added.
Aleppo - Syria's second city - has been a key battleground in the conflict.
Mr Kerry highlighted the fate of the city in his address, accusing President Assad of engaging in "ruthless attacks" with Scud missiles against rebel-held areas.
According to UN estimates, more than 70,000 people have been killed in Syria since the revolt against President Assad began nearly two years ago.
Opposition fighters have been constantly outgunned as President Assad's forces deploy tanks, aircraft and missiles against them.
The UN's refugees agency says the number of Syrians who have fled the conflict into neighbouring countries is now approaching one million, while two million have been internally displaced.
The World Health Organisation has warned of disease outbreaks and worsening medical services.
Earlier, UK Foreign Secretary William Hague said the Friends of Syria were determined to "ramp up" assistance to the opposition.
"We are entering a new phase in the response of Western and Arab nations to the crisis in Syria," he said.
The Friends of Syria organisation has broad international support, but does not include Syrian allies Russia and China.
On Thursday Russian President Vladimir Putin held talks on Syria with his French counterpart Francois Hollande.
He conceded that there were differences in the positions of Russia and France, but said both had agreed that Syria should not be allowed to break apart as a result of the conflict.


Dame Sarah Storey has just arrived home from a pretty successful Paralympics in Rio, even by her standards.

22 September 2016 Last updated at 08:22 BST
Her three new gold medals means that she's now Great Britain's most successful female Paralympian of all time, with an incredible 14 golds.
"It was an incredibly emotional time getting the medals," Dame Sarah told Newsround.
She also said she couldn't believe how heavy the gold medal was!
Watch the Paralympic star answering your questions.


A scheme where volunteers work with sex offenders to stop them reoffending has received a £30,000 funding boost after achieving a 100% success rate since it was launched in 2007.

Circles of Support and Accountability (Cosa) is run across the six north Wales counties by charity Cais and the probation service, with 100 volunteers.
Offenders go through a rigorous risk assessment before they can sign up.
The money is coming from the North Wales police and crime commissioner.
Cais chief executive Clive Wolfendale said upon release from prison sex offenders were often relocated - making it more likely for them to reoffend.
"With no social connections or bedrock to make a go of life the prospect of them re-offending becomes more likely and presents a very real danger to society," he added.
"Cosa addresses that in a practical, direct way, putting the individual together with a team of volunteers to support them through rehabilitation techniques.
"The aim is to steer them towards a more meaningful, crime-free contribution to society and eventually productive employment."
The Cosa approach was launched in Canada and first trialled in the UK 15 years ago by Thames Valley Probation Area which achieved a 75% drop in re-offending.


Police are investigating after a 13-year-old girl was sexually assaulted in Carnoustie.

Officers are carrying out "extensive inquiries" into the incident, which occurred between 21:45 and 22:05 on Sunday near a garage on Dundee Street.
They are keen to trace a slim white man in his 20s, who at the time was wearing a dark coloured long-sleeved top and blue jeans.
Officers have appealed to the public for information.
Det Insp Andy Patrick said: "This is a particularly distressing assault on a young girl and we are appealing for anyone who may have seen this man in the area of Dundee Street on Sunday to come forward and assist us with our investigation.
"We would reassure the public that we are using all available means of inquiry to identify the person responsible and we would urge anyone who has any information that may assist with our inquiries to contact us."


Nato's political leaders have given the go-ahead for a fundamental re-casting of Nato's rapid reaction forces to bolster deterrence and reassure worried member states.

The alliance's new Readiness Action Plan contains a variety of measures to overhaul the reaction forces. The aim is to make sure that they can be well-equipped, highly trained and rapidly mobile.
The goal is to make good on Nato Secretary General Anders Fogh Rasmussen's assertion at the Wales summit that "Nato protects all its allies at all times".
The message to any aggressor, he noted, was clear: "Should you even think of attacking one ally, you will be facing the whole alliance."
Of course, the essence of deterrence is not just capability but credibility. Nato's military chief in Europe, Gen Sir Adrian Bradshaw, said the overhaul of the response forces would mean taking a fundamental look at "the mechanisms by which this force is generated, trained and projected".
The current Nato Response Force is designed as a multinational organisation made up of land, air, maritime and Special Operations Forces. It is made up of three parts: A Nato command or headquarters element; a joint force of around 13,000 contributed by allies; and a pool of additional units to reinforce where necessary.
The intention is to make one small part of this force even more rapidly deployable. It is being described as "a very high readiness spearhead" - some 4,000 strong - that could move eastwards say to Poland or north to the Baltic Republics within 48 hours.
Britain looks set to contribute a battle group to the land element of the force - say about 1,000-men - together with a brigade headquarters.
But nearly all the details must now be worked out. What should be the exact shape of the force and its capabilities? What about the vital enabling elements - logistics, communications and so on - that are required to get it into the field?
Then there is the vital question of what is called host-nation support. The spearhead's likely areas of deployment will also have to be studied. Does the infrastructure there enable rapid reinforcement? What bases might need to be enhanced or expanded? What equipment and supplies may need to be positioned ready for the reinforcing units when they arrive?
This new eastward thrust may require a new overall headquarters so that arriving units can be slotted into an existing strategic environment. Studies are under way to see if the new Multinational Corps North East headquarters needs to take on a specific role focusing on threats to Nato territory.
Nato also has to look at other enhancements and improvements as to how it does business. Intelligence needs to be improved. There needs to be a better understanding about what is going on in countries on Nato's borders. In military terms, as Gen Bradshaw put it, there has to be a clearer sense of the "indicators and warnings that might trigger a defensive deployment".
There is going to be a greatly enhanced exercise programme with regular manoeuvres to train and demonstrate the new spearhead force's capacities.
This, says Gen Bradshaw, should enhance deterrence. You demonstrate capability "so that you don't have to get involved in a conflict."
Some analysts have described Russia's seizure of the Crimea and its alleged incursions into eastern Ukraine as a new kind of warfare - "hybrid" or "ambiguous" warfare. This is the use of conventional military build-ups and activities like subversion, agitation, political demonstration, along with a newer element - cyber attacks.
The whole purpose is to confuse the outside world.
Apart perhaps from the cyber element, much of this is not really all that new. Gen Bradshaw acknowledged that strategy has always been about combining all elements of government power. But it is clear that in a conflict that has been waged almost as much in the international media as it has on the ground, perceptions - and the managing (some would say manipulation) of perceptions - matter.
Better intelligence, concerted cyber defences and a greater rapidity of response are clearly three things intended to combat this "fog of hybrid war".
However, Nato's plans prompt many questions. For one thing they require more money.
Will the burden be equally shared? The Wales Summit communique speaks of those countries (24 out of 28 Nato members) who spend less than 2% of GDP on defence aiming "to move towards the 2% guideline within a decade".
In the past, brave budgetary words have rarely meant much in practice. Maybe the resurgent Russian threat, such as it is, will concentrate minds.
There are also big questions for some of Nato's key members as well, not least Britain. It plans to take a prominent role in the new spearhead force. It has also announced that it will establish a joint expeditionary force with a number of other allies.
Then there is also the joint Franco-British expeditionary force that is already being established.
But money is tight and new equipment is needed, not least because of the ravages of war in Iraq and then Afghanistan. Britain is one of the few Nato countries that does spend 2% of its GDP on defence, but respected UK think-tank Rusi has raised questions about whether Britain will be able to continue doing so.


Kent earned a first win in four T20 Blast matches, beating Somerset by seven wickets in a rain-affected game.

Sam Northeast's unbeaten 54 guided his side to a revised target of 181 off 18 overs after Somerset made 197-6.
Middlesex moved off the bottom of the South Group, ex-New Zealand captain Brendon McCullum smashing 63 from 28 balls to help beat Essex by 72 runs.
In the North Group, Northants easily passed Worcestershire's 158 all out to earn a seven-wicket win.
Brett D'Oliveira (52) was the mainstay of a below-par Rapids total, in which seven players failed to reach double figures, with Richard Gleeson (3-12) and Rory Kleinveldt (3-25) doing the damage with the ball.
Reigning T20 champions Northants scored 160-3 to earn a third win in four matches and go second in the table.
Openers Richard Levi (47) and Adam Rossington (42) ensured a blistering start and Alex Wakely's unbeaten 46 got the Steelbacks over the line with 14 balls left.
A season's-best T20 Blast powerplay total of 77-0 by Kent openers Joe Denly and Daniel Bell-Drummond teed up an impressive victory at Canterbury.
Some ferocious hitting and fine timing saw Steven Davies (62) and Johann Myburgh (64) star in Somerset's 197-6.
But former England man Denly and Bell-Drummond were equally impressive, despite a brief wobble following the rain delay which saw the Duckworth-Lewis-Stern system set a new target of 181.
Both men fell soon after the resumption, however captain Northeast ensured Kent went up to fifth in a tight group with four points separating all nine teams.
Middlesex had no shortage of leaders as they batted Essex out of the game on their way to a total of 203-6 and a crushing 72-run win over Essex Eagles.
T20 Blast skipper McCullum was at his destructive best, reaching his half-century off just 19 balls and scoring 54 of his 63 runs from boundaries.
England ODI and T20 captain Eoin Morgan added a more considered 39 from 30, while wicketkeeper John Simpson (50) also made a half-century.
Pace bowler Tom Helm then took 5-11 from just 20 balls as Essex were all out for 131, with James Foster's 25-ball 50 the only show of resistance in a lacklustre reply.
The result takes Middlesex up to fourth in the table, with Essex dropping to bottom spot.


New York Mets player Jenrry Mejia has been suspended for 80 games without pay after testing positive for the banned substance stanozolol.

The pitcher, 25, will not be able to play again until July and would be ineligible for the Major League play-offs if the Mets qualify.
"I know the rules are the rules and I will accept my punishment," Mejia said.
"But I can honestly say I have no idea how a banned substance ended up in my system."


A piece of debris that experts believe could be from missing flight MH370 has arrived in Paris from the French island where it was found on Wednesday.

The object, believed to be part of a wing, was flown to the French capital from Reunion in the Indian Ocean.
From there it will be transported to a defence ministry laboratory in Toulouse for analysis.
The Malaysia Airlines Boeing 777 travelling from Kuala Lumpur to Beijing vanished in March 2014.
There were 239 passengers and crew on board.
Since then, an Australian-led search effort has been focused on a vast area of the southern Indian Ocean about 4,000km (2,500 miles) to the east of Reunion, a French overseas department to the east of Madagascar.
Experts have said the two-metre (6ft) object washed up on a beach could be a moveable piece of a Boeing 777's wing, called a flaperon.
A team from Malaysia Airlines has already arrived in Toulouse and French officials say analysis of the part should begin on Wednesday.
The military laboratory is expected to verify the serial number of the object and conduct further tests. Fragments of a suitcase found on the same beach are also to be examined.
The centre in Toulouse was also involved in analysing debris from the Air France flight AF447 which crashed on a flight from Brazil to Paris in 2009, killing 228 people.
Missing Malaysia plane: What we know
MH370: Behind the tenacious deep-sea hunt for missing plane
Earlier, Martin Dolan, chief commissioner of the Australian Transport Safety Bureau, said the agency was "increasingly confident that this debris is from MH370".
"There is no other recorded case of a flaperon being lost from a Boeing 777," Mr Dolan said.
However, he also said the discovery of debris might not help pinpoint where the plane went down.
"Over the last 16 or 17 months, any floating debris would have dispersed quite markedly across the Indian Ocean," he told AFP news agency.
Authorities believe the plane veered off course - for reasons unknown - and went down in the southern Indian Ocean. Its estimated last location was based on "pings" sent from the plane that were detected by satellite.
However, no physical evidence has been found and in January Malaysian authorities declared that all on board were presumed dead.
Australian officials and Malaysian Prime Minister Najib Razak have said the location of the debris on Reunion was consistent with drift analysis provided to investigators.


The return of BBC One's The Great British Bake Off attracted 9.3 million viewers - more than two million up on last year's opening episode.

Wednesday saw the start of the journey for 12 amateur bakers who are vying to be crowned the latest Bake Off winner.
Last year saw the series move from BBC Two to One, and it attracted huge ratings thanks to headline-grabbing incidents such as "Flangate".
A record 12.3 million viewers watched Nancy Birtwhistle win the final.
The opening episode in 2014 was watched by 7.2 million people, while the previous year's premiere was seen by 5.6 million.
Last night 43% of all TV viewers were watching Bake Off, with a peak viewing figure of 10 million at 20:50 BST. The overnight figures are likely to rise once the consolidated figures are released, which add views from time-shifted and catch-up services.
The series premiere saw musician Stuart Henshall become the first contestant to leave, as his Madeira sponge, walnut cake and Black Forest gateau failed to impress judges Mary Berry and Paul Hollywood.
His failure was compounded by the fact that another contestant's signature bake completely collapsed after her chocolate mousse did not set. Dorret Conway's sunken gateau brought on the first tears of the series.
The Great British Bake Off is hosted by Sue Perkins and Mel Giedroyc, who in part are responsible for the popularity of the show, winning praise for their funny and caring presenting style.
Perkins returned to Twitter yesterday following a four-month sabbatical prompted by a barrage of hateful tweets over rumours she would take over Top Gear.
"Bake Off Series 6 spoiler! Format change means all-new Swimwear Round replaces Showstopper Challenge. (And hello BTW, I've missed you xx)," she wrote ahead of the premiere.
Meanwhile, Ladbrokes has suspended betting on the show after a flurry of wagers sparked fears the winner's name may have been leaked.
"A run of bets" was placed for one contestant, many at shops in the Ipswich area, the bookmaker said.


Even if the best picture announcement had happened smoothly and to plan, Moonlight's win would still have been regarded as one of the biggest Oscar stories and upsets of recent times.

What could have helped it to victory over La La Land, the favourite heading into the ceremony? Well, there are various factors that might, just might have come into play.
Firstly, of course, Moonlight is an exceptional piece of film-making. And it may well be that its coming-of-age theme, sumptuous photography and nuanced performances simply ended up resonating more strongly with voters than any of the rival films that were also nominated for best picture.
In 2016, after two years of #OscarsSoWhite, the Academy invited a large number of individuals from ethnic minority backgrounds to join and take part in voting. The Academy remains overwhelmingly white and male, although slightly less so than before.
If it was a very close race, a somewhat more diverse membership may have been a factor.
The Academy operates a preferential voting ballot. This means that one film could potentially receive the most votes as members' favourite film - which would give it victory in a first-past-the-post system of the kind employed by others, including Bafta - but still be beaten to the award by another film which had gained a significant proportion of second-favourite choices across the board.
La La Land has led the race since it premiered at the Venice Film Festival last August to rave reviews. By the time many Oscar voters saw the movie, some may have felt that after months of superlative after superlative being heaped up on it, it had been excessively hyped.
With the current political atmosphere in the United States, many Oscar voters may have thought that this was a time to honour a film that felt like a particularly important piece of work. Excellent as La La Land is, a win for the singing, dancing love letter to Los Angeles may have felt too frothy and self congratulatory.
Moonlight, a film about acceptance and struggle, certainly feels like a movie that is more than a simple piece of entertainment.
The Academy has around 6,500 members, and the reasons they will have voted the way that they did, of course, could and probably did vary wildly from voter to voter.
The Academy doesn't release voting figures, so there's no way of knowing how emphatic Moonlight's victory was. It could have come down to one vote, it could have won by a landslide.
But Moonlight winning against a film that seemed to be a runaway favourite is a huge achievement. And there's no doubt that Barry Jenkins' story following a character from childhood to manhood is a more than worthy winner of cinema's biggest prize.
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Hannah Cockroft took T34 100m gold in world record time as Britain won three medals on the opening night of the World Para-athletics Championships at London Stadium.

Cockroft, 24, a triple gold medallist at Rio 2016, broke her own all-time mark by finishing in 17.18 seconds.
Fellow Briton Kare Adenegan claimed silver, with GB's Carly Tait fifth.
Great Britain's Gemma Prescott won bronze in the F32 club throw - matching her achievement at London 2012.
Compatriot Abbie Hunnisett finished eighth in the same event.
There was disappointment for British defending champion Jo Butterfield, who failed to match her gold medal in the F51 club throw at Rio 2016.
She was sat in bronze position but was agonisingly edged out by the final throw of American world record holder Rachael Morrison.
Fellow Briton Kylie Grimes finished fifth.
British 21-year-old Zac Shaw will race in Saturday's T12 100m final after winning his heat.
"Honestly it was not a great run but to qualify as a winner - you cannot beat that and the roar from the crowd was amazing," Shaw told BBC Radio 5 live.
"It was one of the proudest moments of my life right there and I have definitely got more."
Yorkshire's Cockroft now has 13 global titles in her career - five at the Paralympics and eight at the World Championships - and remains undefeated in major competitions.
And she can still add two more in London with the 800m final on Monday, followed by the 400m on Thursday as she looks to defend all three of her world titles.
"It is an alright start - I'll take that. But that is the easy one out of the way," she told BBC Radio 5 live.
"I had to kind of hold back tears on my warm-up lap because so many people were shouting my name.
"The less we say about the 800m the better. It will be a tough race, not easy, I'm not guaranteed to win that."
Adenegan, 16, who has had to juggle studying for her GCSEs with racing, adds to her silver and bronze medals from Rio 2016.
Australian Cameron Crombie won the first gold medal of the Championships with a world-record throw of 15.95m in the F38 shot put.
And Finnish sprint superstar Leo-Pekka Tahti managed to win his third T54 100m world title despite the strap in his chair breaking at 60m. Tahti was already well clear of the field by then and despite sitting up in his chair was able to comfortably finish ahead of China's Yang Liu and Kenny van Weeghel of the Netherlands.
There was one bizarre moment on Friday when Colombia's Dixon de Jesus Hooker Velasquez just stopped running in the T38 800m at the halfway stage despite holding a healthy lead.
It turned out that having been entered for the 800m, under competition rules he could not skip the race, otherwise he would not be allowed to compete in his favoured 400m later in the championships.
By withdrawing after 400m on Friday his result was listed as did not finish as opposed to a disqualification.
Stef Reid will look to upgrade her F44 long jump silvers from London 2012 and Rio 2016 (11:00 BST).
Butterfield has a second chance of winning a medal in the F52 discus (19:18), Hollie Arnold looks for a third world title in the F46 javelin (19:57) and Richard Whitehead can add a fourth world gold with victory in the T42 200m (20:29).
Toby Gold, Andrew Small and Daniel Bramall are all medal contenders in the T33 100m (20:38), while Sophie Hahn (T38 200m; 21:05) and world record holder Sammi Kinghorn (T53 200m) are on the gold hunt.
America's world and Paralympic champion David Brown, the first totally blind athlete to run 100m in 11 seconds, goes in the T11 100m (21:14), while compatriot Tatyana McFadden seeks an eighth global medal in the T54 200m, where she meets her sister Hannah in the F46 javelin (19:57).


Discount supermarket chain Aldi has announced plans to open eight more stores in Scotland this year, creating more than 300 jobs.

The move will bring its total number of shops north of the border to 72.
Aldi said that by the end of this year it will employ about 2,500 people in Scotland - an increase of 200% since 2012.
In the UK as a whole, Aldi plans to hire 5,000 more staff this year and open 80 new stores.
Planned store locations in Scotland:
• Annan, Dumfries and Galloway
• Polmont, near Falkirk
• Fruitmarket Place, Edinburgh
• Portobello, Edinburgh
• Cornhill, Aberdeen
• Strathaven, South Lanarkshire
• Newton Mearns, East Renfrewshire
• Auldhouse Retail Park, Glasgow
The company also said it planned to continue growing its range of Scottish-sourced products, having increased the number of Scottish lines by 30% since 2013.
In the past year it has signed a number of large supplier deals, including a £250,000 contract with Montrose-based Stirfresh to supply fresh ready-to-cook vegetables and a six-figure deal with Dean's of Huntly to supply stores across the country with shortbread and oat biscuit selections.
Richard Holloway, managing director of Aldi in Scotland, said: "Our business model in Scotland has always been about working with the best local producers to bring top quality products to our customers at everyday low prices.
"In the year ahead, we want to grow relationships with existing suppliers and cultivate new ones too."


The Duke and Duchess of Cambridge have visited the 1st Battalion Irish Guards at their barracks in Aldershot to celebrate St Patrick's Day.

The duchess presented sprigs of shamrock to some 300 soldiers on parade and Irish wolfhound Domhnall - the regiment's mascot.
Prince William was made an honorary colonel of the regiment in 2011.
The event, at Mons Barracks, dates back to 1901.
The presentation of the shamrocks was previously performed by the late Queen Mother.


A Gwynedd museum dedicated to the only Welsh prime minister is set to be saved after receiving a financial boost in Chancellor George Osborne's Budget.

The Lloyd George Museum in Llanystumdwy will get £27,000 a year over three years from 2017/18.
It is the same amount Gwynedd council will cut from the venue's funding which put its future at risk.
Dion Hamer, from the museum, said the funding was "great news".
The museum was established in 1947, two years after David Lloyd George died. His second wife, Frances, left some land in the village to build a permanent memorial to her husband.
The museum launched a £250,000 centenary appeal earlier this year.


A worrying statistic for the tech industry was revealed in freshly-released A-level data - only 9.8% of those completing a computing course were girls.

It comes amid a storm in Silicon Valley over the number of women employed in the tech industry.
Experts agree that the world faces a digital skills shortage and that a more even gender balance is crucial.
One industry body worried that too few boys were also choosing the subject.
"Today's announcement that nearly 7,600 students in England took A-level computing means it's not going to be party time in the IT world for a long time to come," said Bill Mitchell, director of education at the IT Chartered Institute, BCS.
He said that it fell well short of the 40,000 level that "we should be seeing".
But he added that the fact so few girls were taking the subject was particularly worrying.
"At less than 10%, the numbers of girls taking computing A-level are seriously low."
"We know that this a problem starting at primary school and it's something that we need to address at all levels throughout education.
"As a society, we need to make sure that our young women are leaving education with the digital skills they need to secure a worthwhile job, an apprenticeship or go on to further study."
The figures, from the Joint Council for Qualifications (JCQ), are not all bad news. They reveal that there has been a 34% rise in the number of female students sitting the computer science exam, up to 816 from 609 in 2016.
Google engineer James Damore caused controversy this month when he penned a memo suggesting that there were fewer women at Google because of biological differences. The search giant sacked him over the remarks, saying they were "offensive".
A recent survey of 1,000 university students conducted by audit firm KPMG suggested that only 37% of young women were confident they had the tech skills needed by today's employers.
A total of 73% said that they had not considered a graduate job in technology.
Aidan Brennan, KPMG's head of digital transformation, said: "The issue here isn't around competency - far from it - but rather how businesses understand the underlying capability of an individual and how to unlock it.
"I think this research highlights the work that needs to be done to show the next generation that when it comes to a career in tech, gender isn't part of the equation.
"Competition for jobs is tough and we know that female job seekers can be less likely to apply for a role than their male counterparts if they don't feel they already possess every prerequisite the job demands."
Anne-Marie Imafidon MBE, who founded the charity Stemettes to persuade more girls to pursue careers in Science, Technology Engineering and Maths has her own view about the low number of girls taking A-level computing.
"Girls often don't want to be the only one in the class so they tend not to pick the subject when it is an option," she said.
"Also, it's often not even an option in a lot of schools so it's an uphill battle but fortunately, a lot of computer science courses take A-level maths students, so there is a very viable route for girls into the course itself and related courses."


Manchester United reached the Europa League knockout stages by beating Zorya Luhansk as Henrikh Mkhitaryan struck a fine first goal for the club.

The Red Devils dominated in the Ukrainian city of Odessa, but long-range efforts from Wayne Rooney and Paul Pogba were their best moments of the first half despite having 76% of possession.
But Mkhitaryan, who has now started three games in a row, dribbled from halfway to apply a cool finish after the break.
A key save from Sergio Romero maintained the lead before Zlatan Ibrahimovic raced clear to slot home as United progressed behind Fenerbahce, who won at Feyenoord.
Jose Mourinho's side are now favourites for the competition with most bookmakers but in finishing second in Group A, they go into Monday's last-32 draw as an unseeded side.
United ground out a first win away from home in the Europa League this season on a pitch Mourinho described as "difficult" leading up to the fixture.
Though their final ball was often slack - leading to some visible Mourinho frustration in the first half - they stuck to the task, none more so than Mkhitaryan, who showed balance and poise to create his goal.
One goal and two assists in his run of three starts begs the question as to why Mourinho has not used the Armenian regularly since a £26m summer move from Borussia Dortmund. But United fans are starting to see the type of quality which saw him named Bundesliga players' player of the season ahead of his move to Old Trafford.
There were other positives for United, who rested keeper David De Gea and forward Anthony Martial with Sunday's Premier League trip to Tottenham in mind.
Ibrahimovic's form is gathering momentum - his late finish was a sixth goal in seven matches - while the sight of central defender Eric Bailly completing a fixture for the first time since October will also please Mourinho.
The Ivorian, who has recovered from a knee injury, looked composed, decisive and even shook off a nasty collision to continue late on.
An away trip to the rugged surroundings of Zorya Luhansk in Ukraine perhaps sums up the burden this competition can become.
The Thursday-Sunday fixture cycle will continue for Mourinho, notably with a trip to Manchester City three days after the second leg of their last-32 fixture on 23 February.
An English side has only finished in the top four of the Premier League on three occasions after starting the campaign in the Europa League.
United are nine points off the Premier League's Champions League qualification places. So does Mourinho prioritise the league or a Europa League run and the Champions League berth that comes with the trophy? History shows it is difficult to achieve both.
Manchester United, sixth in the Premier League, host fifth-placed Tottenham - who they trail by six points - in a 14:15 GMT kick off on Sunday.
Match ends, Zorya Luhansk 0, Manchester United 2.
Second Half ends, Zorya Luhansk 0, Manchester United 2.
Eric Bailly (Manchester United) wins a free kick in the defensive half.
Foul by Jaba Lipartia (Zorya Luhansk).
Corner,  Manchester United. Conceded by Igor Levchenko.
Attempt saved. Timothy Fosu-Mensah (Manchester United) right footed shot from a difficult angle on the right is saved in the bottom right corner. Assisted by Zlatan Ibrahimovic.
Eric Bailly (Manchester United) is shown the yellow card for a bad foul.
Corner,  Zorya Luhansk. Conceded by Marcos Rojo.
Goal!  Zorya Luhansk 0, Manchester United 2. Zlatan Ibrahimovic (Manchester United) right footed shot from the centre of the box to the bottom right corner. Assisted by Paul Pogba with a through ball.
Foul by Marouane Fellaini (Manchester United).
Jaba Lipartia (Zorya Luhansk) wins a free kick in the defensive half.
Substitution, Manchester United. Timothy Fosu-Mensah replaces Henrikh Mkhitaryan.
Paul Pogba (Manchester United) wins a free kick on the right wing.
Foul by Igor Chaykovsky (Zorya Luhansk).
Ander Herrera (Manchester United) is shown the yellow card for a bad foul.
Foul by Ander Herrera (Manchester United).
Dennis Bonaventure (Zorya Luhansk) wins a free kick in the defensive half.
Attempt missed. Zlatan Ibrahimovic (Manchester United) right footed shot from outside the box is just a bit too high. Assisted by Sergio Romero.
Offside, Zorya Luhansk. Evgeniy Opanasenko tries a through ball, but Ivan Petryak is caught offside.
Foul by Paul Pogba (Manchester United).
Igor Levchenko (Zorya Luhansk) wins a free kick in the defensive half.
Corner,  Manchester United. Conceded by Rafael Forster.
Attempt blocked. Jesse Lingard (Manchester United) right footed shot from outside the box is blocked. Assisted by Paul Pogba.
Attempt missed. Jesse Lingard (Manchester United) right footed shot from outside the box misses to the left. Assisted by Zlatan Ibrahimovic with a headed pass.
Foul by Zlatan Ibrahimovic (Manchester United).
Mikhail Sivakov (Zorya Luhansk) wins a free kick in the defensive half.
Attempt missed. Marouane Fellaini (Manchester United) header from the centre of the box is high and wide to the left. Assisted by Henrikh Mkhitaryan following a set piece situation.
Paul Pogba (Manchester United) wins a free kick in the attacking half.
Foul by Mikhail Sivakov (Zorya Luhansk).
Attempt missed. Igor Chaykovsky (Zorya Luhansk) right footed shot from outside the box misses to the right. Assisted by Dmytro Grechyshkin with a cross.
Corner,  Zorya Luhansk. Conceded by Marouane Fellaini.
Attempt saved. Mikhail Sivakov (Zorya Luhansk) header from the centre of the box is saved in the centre of the goal. Assisted by Dmytro Grechyshkin with a cross.
Foul by Jesse Lingard (Manchester United).
Artem Sukhotsky (Zorya Luhansk) wins a free kick on the left wing.
Substitution, Zorya Luhansk. Jaba Lipartia replaces Zeljko Ljubenovic.
Delay over. They are ready to continue.
Substitution, Manchester United. Marouane Fellaini replaces Wayne Rooney.
Delay in match Eric Bailly (Manchester United) because of an injury.
Attempt missed. Dennis Bonaventure (Zorya Luhansk) right footed shot from outside the box is high and wide to the right. Assisted by Igor Chaykovsky.
Substitution, Manchester United. Jesse Lingard replaces Juan Mata.


Anthony Martial's rich goalscoring form continued as Manchester United eased into the League Cup fourth round with victory at home to Ipswich Town.

Wayne Rooney got his first domestic goal of the season to put United ahead against their Championship opponents, who made 11 changes for the game.
Midfielder Andreas Pereira, 19, scored a spectacular free-kick to double the lead on his first start.
And substitute Martial, also 19, coolly slotted home a third in injury time.
How United's League Cup win unfolded
It was the striker's fourth goal in as many matches since his £36m move from Monaco.
Fellow substitute Memphis Depay controlled the ball into his path before the Frenchman stroked beyond Bartosz Bialkowski in the Ipswich goal.
But the goal of the night belonged to Pereira, whose dipping free-kick bent over the Ipswich wall and into the corner.
United face Middlesbrough, who beat fellow Championship side Wolves 3-0 on Tuesday, at home in the next round.
Manchester City v Crystal Palace
Liverpool v Bournemouth
Manchester United v Middlesbrough
Everton v Norwich City
Southampton v Aston Villa
Sheffield Wednesday v Arsenal
Hull City v Leicester City
Stoke City v Chelsea
(Ties to be played on 27-28 October)
Manchester United manager Louis van Gaal:
"It is not so difficult for Martial to stay grounded because he is a player who is very modest and he knows he can score because of his fellow players.
"Twice we made it very easy for him because the gaps were existing and then with his speed and his composure he can score.
"He did it also against Liverpool and now again. We are happy but still we have to keep our feet on the ground."
Ipswich manager Mick McCarthy:
"Manchester United deserved to win. But I am delighted with my players.
"I could have put any team out against that team and probably still would have been beaten."
Match ends, Manchester United 3, Ipswich Town 0.
Second Half ends, Manchester United 3, Ipswich Town 0.
Goal!  Manchester United 3, Ipswich Town 0. Anthony Martial (Manchester United) right footed shot from the centre of the box to the bottom right corner. Assisted by Memphis Depay.
Attempt saved. Andreas Pereira (Manchester United) right footed shot from the centre of the box is saved in the bottom left corner.
Corner,  Manchester United. Conceded by Piotr Malarczyk.
Jonathan Parr (Ipswich Town) is shown the yellow card for a bad foul.
Andreas Pereira (Manchester United) wins a free kick in the defensive half.
Foul by Jonathan Parr (Ipswich Town).
Corner,  Ipswich Town. Conceded by Phil Jones.
Substitution, Manchester United. Memphis Depay replaces Wayne Rooney.
Marouane Fellaini (Manchester United) wins a free kick on the left wing.
Foul by Tommy Oar (Ipswich Town).
Foul by Anthony Martial (Manchester United).
Piotr Malarczyk (Ipswich Town) wins a free kick in the defensive half.
Foul by Ashley Young (Manchester United).
Brett Pitman (Ipswich Town) wins a free kick on the right wing.
Substitution, Ipswich Town. Larsen Touré replaces Jay Tabb.
Corner,  Manchester United. Conceded by Josh Yorwerth.
Attempt missed. Anthony Martial (Manchester United) right footed shot from the centre of the box is close, but misses to the left.
Substitution, Manchester United. Anthony Martial replaces Juan Mata.
Substitution, Manchester United. Phil Jones replaces Chris Smalling.
Foul by Antonio Valencia (Manchester United).
Joshua Emmanuel (Ipswich Town) wins a free kick on the right wing.
Foul by Antonio Valencia (Manchester United).
Jonathan Parr (Ipswich Town) wins a free kick in the defensive half.
Corner,  Manchester United. Conceded by Bartosz Bialkowski.
Attempt saved. Juan Mata (Manchester United) left footed shot from outside the box is saved in the top centre of the goal.
Substitution, Ipswich Town. Freddie Sears replaces David McGoldrick.
Substitution, Ipswich Town. Brett Pitman replaces Daryl Murphy.
Goal!  Manchester United 2, Ipswich Town 0. Andreas Pereira (Manchester United) from a free kick with a right footed shot to the bottom right corner.
Juan Mata (Manchester United) wins a free kick in the attacking half.
Foul by Kevin Bru (Ipswich Town).
Attempt saved. Antonio Valencia (Manchester United) right footed shot from outside the box is saved in the bottom right corner.
Attempt missed. Tommy Oar (Ipswich Town) left footed shot from outside the box is too high.
Attempt blocked. Jonathan Parr (Ipswich Town) left footed shot from outside the box is blocked.
Foul by Bastian Schweinsteiger (Manchester United).
Kevin Bru (Ipswich Town) wins a free kick in the attacking half.
Foul by Marouane Fellaini (Manchester United).
Kevin Bru (Ipswich Town) wins a free kick in the defensive half.
Foul by Andreas Pereira (Manchester United).


Australian churches have said they will offer sanctuary to asylum seekers who face deportation to Nauru.

The High Court on Wednesday found Australia's policy of sending asylum seekers to government-funded offshore processing centres was constitutional.
The decision means people, including 37 babies, face deportation to the detention centre on Nauru.
The Anglican Dean of Brisbane Dr Peter Catt said they would likely face trauma and abuse if deported.
"This fundamentally goes against our faith so our church community is compelled to act, despite the possibility of individual penalty against us," Dr Catt said in a statement.
"Historically churches have afforded sanctuary to those seeking refuge from brutal and oppressive forces."
Ten Anglican and Uniting churches are offering sanctuary, including Brisbane Cathedral.
Ian Rintoul of the Refugee Action Coalition welcomed the move, but said it would be largely symbolic as only about 30 of the asylum seekers were in the community and able to attend a church. The rest are in detention centres.
The churches' offer comes as pressure builds on Immigration Minister Peter Dutton to allow the group to remain in Australia.
Mr Dutton told the Australian Broadcasting Corp that no child would be "put in harm's way".
"We are going to work individually through each of the cases," he said.
Australia intercepts all boats bringing suspected asylum seekers to its territory and takes those on board to Nauru or to Manus Island in Papua New Guinea.
Even if they are found to be genuine refugees they will not be allowed to settle in Australia.
The government says the policy deters people smuggling and saves lives at sea, but it has been widely criticised as breaking Australia's legal obligations.
The announcement that the Anglican Church is to offer sanctuary to the asylum seekers affected by this week's High Court ruling has attracted widespread media coverage.
But it is a largely symbolic gesture.
The vast majority of the 268 people now faced with being forced to return to Nauru have been locked up in mainland Australian detention centres pending the High Court decision.
In other words, even if they wanted to take sanctuary in a church, they are not free to do so.
Only a handful are living amongst the community.
Many would think the government would be concerned about the negative coverage the story has generated internationally, with Australia being portrayed by many as cruel and lacking in compassion.
But ministers also know that domestically, their tough policies towards asylum seekers have broad public support.
The headline in one of Australia's best selling newspapers, Sydney Daily Telegraph, this morning was "Turn Back the Kids."
Most of the children expected to be deported after the High Court ruling are being held with their families at the Wickham Point detention facility.
A medical report commissioned by the Australian Human Rights Commission has found the 95% of children held there showed risks of post-traumatic stress disorder.
The doctors who wrote the report said the children were among the most traumatised they had ever seen.
"We were deeply disturbed by the numbers of young children who expressed intent to self-harm and talked openly about suicide and by those who had already self-harmed," Dr Hasantha Gunasekera said.
Prof Gillian Triggs, president of the Australian Human Rights Commission, called on Australia to uphold its international treaty obligations to protect vulnerable people.
"These responsibilities remain whether or not third-country processing is authorised by Australian law," Prof Triggs said.
The UN also expressed concern about the ruling, and urged the Mr Dutton to "refrain from transferring all concerned individuals to Nauru".
But Mr Dutton defended the government's border protection measures, saying the number of children in detention had decreased from a peak of 2,500 under the previous Labor government to around 80.
"There were 1,200 people who drowned at sea, including women and children, the voices of whom have never been heard,"  he told the Australian Broadcasting Corp.
"Many of the advocates you speak of are completely opposed to any border protection measures at all."


Is banning a person from contesting for public office if he or she does not have a toilet at home a good idea?

India's western state of Gujarat certainly believes so. Earlier this week, the state's legislators passed a bill which makes it mandatory for candidates to have toilets in their homes to qualify for contesting elections to local municipalities and village councils. Existing elected members will also have to declare within six months that they have toilets at home, failing which they will face disqualification.
Prime Minister Narendra Modi, who ruled Gujarat for over a decade before he swept to power in Delhi in May, has made abolishing open defecation a top priority of his government. It is a laudable aim, though critics believe it does not appear to link what is largely an individual-driven campaign to the appalling practice of manual scavenging. Clearly legislators belonging to Mr Modi's ruling BJP in Gujarat have enthusiastically backed their leader's call.
Surely, there is nothing wrong in that. Open defecation blights the lives of millions of Indians and is an enduring health hazard. Nearly half of Indians continue to defecate in the open. Gujarat, one of India's most prosperous states, is in a hurry to build more toilets; the state has a spotty record here. Its new Chief Minister Anandi Patel says she wants the state to be "open defecation free" in two years. A recent report said more than 70,000 people defecate in the open in the main city of Ahmedabad alone. Good economics does not always lead to good sanitation.
But is the latest move linking a democratic right to building a private utility such a good idea?
Some 40% of people in Gujarat live in its 159 municipalities and eight municipal corporation areas in what is one of India's most urbanised states. There are some 13,500 village councils in its more than 18,500 villages. Elections to these bodies are critical to the health of Gujarat's democracy and development. The freedom to contest the polls is also an inalienable right of every citizen living in their cities and villages.
That is why critics like economist Hemant Shah feel that the bill is essentially "undemocratic and discriminatory", and should be challenged in the courts.
Tens of thousands of people in Gujarat's teeming cities live in sprawling chawls - densely packed buildings with more than a dozen tenements - where many families share a single toilet. Will a chawl resident be barred from contesting because he does not have his private toilet? What happens to the political aspirations of a resident of a grubby shantytown home so small that his living space is sometimes equal to the non-existent toilet?
"The government should first provide space and money to build toilets for the poor. The poor are most affected by urban planning because it has always excluded them. Now they can't dream from standing for public office just because they don't have the space or money to build their own toilets?" asks Professor Shah. It's a valid question.


Verona striker Luca Toni will retire from playing after Sunday's home game against former club Juventus.

A World Cup winner with Italy in 2006, Toni has scored 156 Serie A goals in 343 games - for eight different clubs.
He became the oldest player - at 38 - to win the Serie A golden boot, finishing joint top with Mauro Icardi last season on 22 goals.
Toni also had a spell in Germany and was the Bundesliga's top scorer in 2007-08 with Bayern Munich.
In 2005-06, he won the European Golden Shoe, for the leading goalscorer in the continent, with 31 goals for Fiorentina.


Philippine President Rodrigo Duterte launched an expletive-laden attack on the European Union after it condemned his brutal crackdown on crime.

Mr Duterte said the EU parliament was acting out of guilt after it called on him to halt "the current wave of extrajudicial executions and killings".
He said "hypocritical" former colonial powers like France and Britain were trying to atone for their own sins.
Since Mr Duterte took office on 30 June about 3,000 people have been killed.
They have been killed either by police or vigilantes, after the new president effectively sanctioned the murder of criminals and drugs dealers.
Saying the unsayable: Philippine President Duterte
The killings have been widely condemned internationally.
The European Parliament said it was concerned about the "extraordinarily high numbers killed during police operations... in the context of an intensified anti-crime and anti-drug campaign", and asked Mr Duterte to launch an "immediate" investigation.
Baron's daughter killed in Philippines
But the president hit back angrily, saying the European Parliament's colonial-era ancestors killed "thousands" of Arabs and other peoples.
"They're taking the high ground to assuage their feelings of guilt. But who did I kill?
"Assuming it to be true - 1,700, who are they? Criminals. You call that genocide," he told officials in Davao.
"Now the EU has the gall to condemn me."
Members of the European parliament are not the only ones to feel the sharp edge of Mr Duterte's tongue. Here are five other politicians and world leaders he has insulted:
The 71-year-old also swore repeatedly during the outburst, and raised his middle finger in a gesture of defiance.
Mr Duterte said on Sunday he needed to extend his crime war for another six months because the drug problem was worse than he expected, adding on Tuesday that he would shield police and soldiers from prosecution.


A coalition of charities and businesses is calling on world leaders to make tackling illiteracy a global priority.

The Project Literacy alliance says that 11% of the world's population remains unable to read or write.
The campaign is lobbying leaders attending the United Nations general assembly in New York, which has been setting global education targets.
"The curse of illiteracy is global and devastating," said campaign spokeswoman Kate James.
The Project Literacy campaign says it is creating a virtual "petition" on behalf of 757 million people who cannot write their own name.
The partnership brings together charities such as the National Literacy Trust, BookAid and Room to Read, along with education businesses such as Pearson.
The campaign says that illiteracy is a major barrier to economic development, costing $1.19 trillion (Â£1.25tn) per year.
Global education targets, such as the goal of providing primary education for all, have been set since 1990.
But the campaign says that in sub-Saharan Africa, there are 37% more illiterate adults than there were in 1990.
The project highlights the gender gap in who is taught to read and write. Women represent about five in seven of those who are illiterate around the world.
The campaign argues that literacy is linked to better health, reducing crime, job opportunities and democratic engagement.
There are 32 million illiterate adults in the United States and more than 70% of the US prison population have the literacy levels of a nine-year-old or lower.
The impact of illiteracy was "inequality, poverty and disease", said Ms James.
World leaders have been gathering at the United Nations to approve global development targets - the sustainable development goals.
These replace pledges made in the millennium year.
Although some progress was made, none of the targets for education, such as universal primary education, were fully achieved by the deadline of 2015.


Games developer Blizzard is suing a German company over software that offers gamers advantages in its popular first-person shooter game Overwatch.

It is taking legal action against Bossland at a court in California over the "cheat" tools for that and various other titles.
It said that the tools lost it millions of dollars in sales and ruined the game for legitimate players.
But the German company said a US court would have no jurisdiction over it.
"Blizzard's business depends upon its games being enjoyable and fair for players of all skill levels, and Blizzard expends an enormous amount of time and money to ensure that this is the case," the games developer said in a statement.
"The Bossland hacks destroy the integrity of the Blizzard games, thereby alienating and frustrating legitimate players and diverting revenue from Blizzard to defendants."
The Bossland cheat tool Watchover Tyrant offers Overwatch players variety of features, including making enemies visible.
Blizzard already has 10 other continuing legal cases against Bossland in Germany.
But the chief executive of Bossland, Zwetan Letschew, told news site Torrent Freak that he was surprised by the latest legal action and asked why it had taken "five years" for Blizzard to act.
He added Bossland had not yet received the latest complaint.
Howard Rubin, a partner at law firm Bird and Bird, said the US court would have jurisdiction over Bossland, because "it is likely that the licence agreement is subject to US law".
And Blizzard has previously won similar cases - notably against MDY Industries, which creates similar tools.
But Mr Rubin said Blizzard would nevertheless face an "uphill struggle" in its case against Bossland.
"They are pursuing the contractual angle - that this is a breach of the end-user agreement - and that the use of cheats induces a breach of contract, but I don't think that they will be successful," he said.


Changes to Grand National fences were trialled at Aintree on Saturday as the racecourse tries to improve safety.

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Ten horses have died in the big race over the last 12 years.
Four fences have been rebuilt using softer cores instead of the former rigid timber frame.
Two outriders were used on Saturday to help with loose horses during two races over the National fences - the Becher Chase and the Grand Sefton Chase.
Both races passed without serious incident and although there were fallers in each, there were no injuries to either horses or jockeys reported.
John Baker, the regional director of Jockey Club Racecourses responsible for Aintree, said: "We were delighted with how the Grand National fences jumped today, including the trial fences, and we had some fantastic feedback from the professionals."
Jockey Robert "Choc" Thornton said on Twitter: "Great job done by Aintree racecourse and the BHA [British Horseracing Authority] with the fences. They rode great and are well presented."
Clerk of the course Andrew Tulloch was satisfied with the reaction to the fences.
"They seemed to get some favourable comments back from jockeys and it all went quite well," he said.
"We'll be sitting down and having a chat with the jockeys and assessing how we take things forward, if we take things forward, and take it from there."
Saturday was the first time the course had been used since April when the National had two equine fatalities for the second year in succession.
While all 16 fences look the same, covered in spruce brought in from the Lake District, the heart of four obstacles has been changed.
The third and 11th fences, which are open ditches, have been built using natural birch as its core, while the 13th and 14th (which are the last two fences second time round in the National) have plastic birch.
"We have traditionally had a rigid timber frame, which has foam padding along the leading edge, but is solid. We have replaced four of those with an alternative, which will be a bit more forgiving," Tulloch told BBC Sport.
"If the horse hits something solid at racing speed it can unbalance it and cause a fall, but now if horses knock the spruce off, there will be a softer frame underneath. Other horses should be able to brush through it without injuring themselves.
"If it is successful we will roll it out to the other fences. The fences are outwardly the same. We are not lowering them - that could potentially make the horses go quicker."
The move has been welcomed by the RSPCA equine consultant David Muir.
"It allows a horse to make a mistake and survive," he said.
"Previous to that when they hit the solid core of the fences, it took their legs away and it was down to luck whether they got over the other side and managed to get up again."
Several changes were announced in September for the Grand National following a safety review, but the field size will stay at a maximum of 40.
The 2012 Cheltenham Gold Cup winner Synchronised was one of two horses to die in this year's contest.
Synchronised fell at the sixth fence, Becher's Brook, but continued riderless for another five fences before fracturing his leg.
"Everything in life has a risk and our job is to minimise those risks," said Tulloch.
Following the safety review, the start of the National itself will be moved forward 90 yards, reducing the race to four miles and three-and-a-half furlongs, from four-and-a-half miles.
Other measures include £100,000 being invested in irrigation to produce "the safest jumping ground possible" and a new bypass and pen around fence four to catch riderless horses.
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British Airways is to resume direct flights to Tehran later - the first UK carrier to fly to Iran for four years.

Six return flights per week will operate between London Heathrow and Tehran, which BA described as "an important destination".
It follows the lifting of some sanctions against Iran in January and the reopening of the British embassy in the Iranian capital in 2015.
BMI was the last UK airline to fly to Iran, but the service ended in 2012.
The BA Boeing 777 is due to depart from Heathrow just after 21:00 BST.
BA offered the first scheduled flights between London and Tehran in 1946.
However, it ended its service - which at the time was provided by franchisee British Mediterranean Airways - in 2007.
The flights were then operated by British Midland International (BMI), but services were suspended in 2012 as part of BMI's integration into British Airways.
The British embassy in Iran reopened in August last year, after it was ransacked by a mob in 2011.
The reinstatement of regular UK flights also comes after a long-term deal on Iran's nuclear programme was agreed with six world powers - the US, UK, France, Russia, China and Germany - in 2015.
BBC diplomatic correspondent James Landale said BA's decision to resume direct flights may help to improve the UK's relationship with Iran.
Air France resumed flying to Tehran in April after a seven-year break.


The eastern Indian city of Calcutta is to be painted blue, a local minister has said.

Government buildings, flyovers, roadside railings, and taxis should be painted a shade of light blue, a minister in the ruling Trinamul Congress government said.
Owners of private buildings will be also be requested to paint them in the same colour, the minister said.
The capital of West Bengal, Calcutta is home to more than 14 million people.
"Our leader [chief minister of West Bengal] Mamata Banerjee has decided that the theme colour of the city will be sky blue because the motto of the new government is 'the sky is the limit'," Urban Development Minister Firhad Hakim told The Indian Express newspaper.
"From now on, all government buildings, whenever they are re-painted, will be done in sky blue. The owners of private buildings will also be requested to follow the same colour pattern. The necessary government orders will be issued soon."
The colour of the city's famous yellow taxis are going to be changed to light blue and white, while a number of famous landmarks are likely to be repainted too, reports say.
The owners of private buildings will have to pay from their own funds to repaint their premises, the minister said.
"Blue is a beautiful colour and is also soothing for the eyes," Calcutta mayor Sobhan Chatterjee said.
The announcement has been criticised by opposition parties and sections of the media.
A local Congress party spokesman said the government was "preoccupying itself with non-essential issues".
The city's Telegraph newspaper said the "notion of a cosmetic change is taken to unprecedented heights of innovation by the idea" of painting Calcutta blue.
"Finding the right colour combination is undoubtedly the crucial first step in making a city safer, healthier, cleaner and generally more user-friendly for its inhabitants," the newspaper wrote in an editorial.
"It could, with as little doubt, sort out its core problems - chaotic health care, inability to implement pollution control norms, arsenic in the water, archaic sewers and garbage disposal, bad roads, killer buses for public transport, an airport falling apart and beyond dismal, priceless paintings rotting away in public art galleries, to name a few."
Other Indian cities have colour-based themes.
The northern Indian city of Jaipur is famously dubbed the Pink City after its terracotta-colour dwellings.
In 2006, Aurangabad, a crime-infested city in the state of Bihar, was painted pink in order to uplift, according to authorities, its sagging morale and spirit.


A man who hijacked a car from a "vulnerable" community worker in west Belfast has been given a three-year sentence.

Jonathan Briers, of Cherryhill Road in Dundonald, County Down, was so drunk on the day of the hijacking that he has no memory of his actions.
But the 33-year-old admitted four charges linked to the incident.
The judge at Belfast Crown Court told him the hijacking would have been "terrifying" for the woman he targeted.
Briers, who has 126 previous convictions, will serve 18 months of his sentence in prison, with the remaining period on licence when he is released.
The court heard that on 4 December last year, Briers' victim had closed a community centre in Glenbank in west Belfast and was getting into her car when he grabbed her and told her to hand over her car keys.
She gave him the keys to the community centre and ran from the scene to seek help from a shopkeeper.
The woman returned to her car with two men - a member of staff from the shop and a customer.
They found Briers in the driver's seat trying to start the car with the wrong key.
When he was confronted, he got out of the car, apologised and tried to walk away.
One of the men tried to restrain Briers, who lunged at him.
The other man "acted in self-defence" and punched Briers, who fell to the ground.
He refused to give a preliminary breath test when police officers arrived, and while in custody he smeared excrement in a police cell.
The court heard that Briers committed the hijacking less than a week after he was released from prison for serving a sentence for robbing a fast food shop on Belfast's Shankill Road.
His solicitor said that Briers was "completely appalled" by what he did to the woman and that he was "ashamed and embarrassed" by his behaviour in the police station afterwards.
He added that Briers wanted to offer a "full apology" to the woman and the men who came to her aid for the "unsavoury incident".


The Republican candidates for president traded sharp blows over foreign policy and the future of the Supreme Court in an often unruly and chaotic debate.

After Iowa and New Hampshire, the race has now moved to South Carolina before the 20 February primary.
Front-runner Donald Trump repeatedly tangled with Texas Senator Ted Cruz and former Florida Governor Jeb Bush in a series of tense exchanges.
The lively audience repeatedly jeered and booed the candidates.
As the candidates shouted down and interrupted each other, CBS moderator John Dickerson warned: "We're in danger of driving this into the dirt."
Debate highlights:
Mr Trump and Mr Bush clashed over the war in Iraq and President George Bush's role during the 11 September attacks.
Jeb Bush responded robustly to Mr Trump's attacks, a departure for the former governor who originally sought a "joyful" campaign.
"We should have never been in Iraq," Mr Trump said.
"They lied. They said there were weapons of mass destruction. There were none and they knew that there were none."
The Republicans had been looking for a fight before this debate even started. There was a sombre moment to mourn the death of Justice Antonin Scalia. That paved the way for an obvious opening question: who should nominate his successor to the Supreme Court? This president, who would try to appoint a liberal-leaning successor? No, cried Republicans.
On stage, Donald Trump was already out of step and said he was certain President Obama would make the nomination whether Republicans liked it or not.
From there, the debate almost descended into an all-out brawl with the billionaire at its centre. The frontrunner took every opportunity to set himself apart as the outsider, dismayed with the state of politics. He saved the bulk of his ire for Jeb Bush, who has been his target for months. But this time the former Florida governor was ready. He stayed calm and didn't fluff his lines.
It meant Mr Trump came across more as the pantomime villain and the audience reacted accordingly, by booing.
This debate will not be remembered by stand-out performances. Instead, voters witnessed some of the most bitter exchanges of the campaign so far.
Mr Bush pushed back, defending his brother who will soon join Mr Bush on the campaign trail before the pivotal South Carolina primary.
"I'm sick and tired of Barack Obama blaming my brother for all the problems that he's had and frankly I could care less about the insults Donald Trump gives against me," Mr Bush said.
Justice Scalia's death was addressed early on in the debate most of the six candidates saying the next president should choose his replacement.
Mr  Cruz said "we are one justice away" from the court reversing conservative legal gains.
Mr Trump said President Obama would probably pick a replacement, but stressed that Republicans in the Senate should block him.
"Delay, delay, delay," Mr Trump said.
Later, Mr Cruz contended that Mr Trump, who has supported Democrats in the past, would nominate liberal Supreme Court justices if elected president.
"You are the single biggest liar," Mr Trump said to Mr Cruz. "This guy will say anything."
The next primary and caucus is in South Carolina next week. Other states will have their turn over the coming weeks and months.
Each party formally announces their presidential candidate at conventions in July, four months before the presidential election.
20 February - South Carolina primary (Republican); Nevada caucus (Democrat)
23 February - Nevada caucus (R)
27 February - South Carolina primary (D)
1 March - 'Super Tuesday' - 15 states or territories decide
18-21 July - Republican convention, nominee picked
25-28 July - Democratic convention, nominee picked
8 November - US presidential elections
In depth: Primary calendar


Head coach Gregor Townsend is confident Glasgow Warriors can go far in this season's European Rugby Champions Cup.

The Pro12 champions open their European campaign away to French side Racing 92 on Saturday.
Northampton Saints and Scarlets are also in Pool 3 and meet at Franklin's Gardens later on Saturday.
"We certainly have a playing group I believe can get to the latter stages of the Champions Cup," Townsend told BBC Scotland.
"We are playing a team we don't know much about but we know who they've got in their roster and they are very strong.
"They have played eight or nine games this season and we've had a good look at them.
"We know that, if we can put our game in place, both defensively and in attack, it's going to cause any team problems."
Townsend described Northampton as "one of the strongest teams in England over the last 10 years" and Welsh side Scarlets as "the form team in [Pro12]".
"All three teams are going to be threats," he said.
The Warriors did not progress from the pool stage in last season's inaugural Champions Cup tournament and Townsend warned that his side must play to their full potential throughout.
"You've got to play very well, close to your best, for the six games," Townsend said.
"Last year, we won against Bath and Montpellier, but it wasn't good enough as we only won one more match after that.
"We've had more experiences of winning big games [since then] - winning the semi-final and final in the Pro12.
"Our players, most of them that are going to be involved this weekend, have played in the World Cup. So they have had excellent experiences since they last played in the Champions Cup, but it's how we play right from the start."


The son of a couple whose mummified bodies have been in an Edinburgh mortuary for 15 years is appealing against a judge's decision to allow the City of Edinburgh Council to bury them.

Melvyn Marcel believes Lord Mulholland acted incorrectly when he gave permission for burials to be arranged.
Councillors had gone to the Court of Session after they had not received instructions on how to proceed.
Eugenios and Hilda Marcel's bodies were found in a shop in 2002.
In February, Lord Mulholland ruled that Mr Marcel had a statutory duty to arrange funerals for his parents.
However, Mr Marcel believes Lord Mulholland acted incorrectly.
He wants to build a fridge at his Edinburgh home then plans to build a private mausoleum in the grounds of his property.
He eventually plans to take his parents' bodies to be buried in the West Bank in the Middle East.
On Tuesday, Mr Marcel launched his appeal during a short hearing at the Court of Session.
Judge Lady Clark of Carlton told Mr Marcel the court would hear the case in July.
She added: "This case has been going on for quite a long time. The court is anxious for the case to make progress."
The couple have been kept at the City of Edinburgh Council's Cowgate morgue since police found them in the basement of a fishmonger's shop in Polwarth in 2002.
Mrs Marcel had died in 1987 from lung cancer while her husband passed away from prostate cancer aged 91 in 1994. Their bodies were embalmed and a relative regularly visited them at the premises.
Police discovered Mr and Mrs Marcel's bodies during an investigation into alleged fraud at a funeral home in West Lothian.
It was claimed that staff at the Broxburn undertakers had been paid to preserve the remains and four employees were sacked.
However, none of those who were allegedly involved in the fraud were charged or prosecuted for any offence.
Since then the Marcels have been in the mortuary with officials unable to find them a more suitable place without the consent of the family.
The local authority was unable to do anything because the couple's sons - Nigel and Melvyn - had not given council officials instructions on what should be done.
Lawyers acting for the council went to the Court of Session in a bid to gain a legal order which would allow them to organise a burial or cremation for Mr and Mrs Marcel.
Lord Mulholland then ruled that the council had the authority to arrange burials.
The couple had previously come to public attention in 1984 when Mrs Marcel lost a claim for damages against the Royal Bank of Scotland at a Scottish court.
The financial institution had mistakenly addressed a bank statement to her husband revealing to him that she had borrowed Â£6,000 to take a round-the-world trip with Melvyn, her younger son.
Nigel Marcel, who ran the Roxburgh Hotel in Dunbar, East Lothian, became "so upset" after reading the statement, "he began to act irrationally and chased guests out of the hotel".
Melvyn Marcel told the court that relationships had broken down several years earlier.
The appeal will be heard at the Court of Session on 14 July 2017.