Jakarta's chief of police has said Indonesia is hunting terror cells believed to be behind Thursday's attack on the capital.

Two civilians and five attackers died in the gun and bomb assault in a busy commercial district.
Insp Gen Tito Karnavian said the attackers had been "neutralised" but were linked to groups across Indonesia and were "part of a global network".
The Islamic State (IS) militant group has said it was behind the attack.
It released a statement online saying it had been carried out by "soldiers of the Caliphate", targeting "citizens of the Crusader coalition" against the group.
Three men were arrested near Jakarta early on Friday, police told local media. It was not immediately clear whether they had direct links the attacks.
Authorities have named Bahrum Naim, an Indonesian believed to be fighting with IS in Syria, as the suspected co-ordinator.
Insp Gen Karnavian said Naim's "vision" is to unite the various IS-supporting groups across South East Asia.
Indonesia - which has been attacked by Islamist militants several times - had been on high terror alert following recent threats issued by IS.
Security forces battled militants for hours on Thursday in a major business and shopping district of Jakarta.
The assault ended when two of the attackers were killed in a suicide bombing, said police, with the other three killed in gun battles.
A Canadian and an Indonesian national, both civilians, also died and at least 20 people were injured.
'Game-changer' for Indonesia - Ali Moore, BBC News,  Jakarta
Life is getting back to normal on the junction where the attack happened - but only up to a point.
Traffic is flowing and the road sweepers are busy, but the police post which was hit remains boarded up, and the Starbucks cafe at the centre of the attack is surrounded by iron fencing, curious onlookers and media using anything at hand to peer over the top at the blown out windows.
The condolence flowers have now been removed - probably to stop the crowds gathering to take selfies, risking their lives in the morning traffic.
But with the city's police chief admitting Thursday's assault is likely a game-changer for Indonesia, there is no doubt the risk of another attack has taken a new form. And no matter how "tiny" the group, as he called them, they have proved they can kill.
Insp Gen Karnavian told the BBC that main culprits had been "neutralised" but were "connected to other cells in Java and Sulawesi and we are chasing them".
He said one IS plot had been foiled at the end of 2015 and a number of people detained, among them a man who said he had been instructed by Naim.
Naim has been linked to the IS-allied East Indonesia Mujahidin Group (MIT), which is based on the island of Sulawesi.
The police chief said Indonesia had significantly developed its understanding of domestic terror networks since the 2002 bomb attack in Bali, which killed 202 people.
Some 1,000 people linked to radical networks had been brought to justice in Indonesia since 2000, he said, but some had since been released from prison and had "the potential to pose a threat".
"What we need to do today is strengthen capability and also sharing information with others because it is not home grown in Indonesia but it is part of a global network," he said.
Indonesian President Joko Widodo has condemned the attacks as "acts of terror".
He tweeted on Friday that there was "no place for terrorism on Earth" and that "every citizen in the world" needed to fight it.
Indonesia has suffered militant attacks in the past, but has been relatively successful in curbing home-grown Islamist extremism after a spate of attacks in the last decade. Some of the deadliest include:
The Islamic State threat in South East Asia


Family and friends have paid tribute to a prison officer killed on a night out in the early hours of Christmas Day.

Police were called to Pier Street, Ventnor, on the Isle of Wight, shortly after midnight to reports a 57-year-old man had been assaulted.
Nick Medlin was pronounced dead at the scene. His family said they were "completely devastated".
Two men from the island, aged 31 and 32 have been arrested on suspicion of murder.
A third man, aged 26, was released on bail pending further inquiries.
Mr Medlin, a father-of-two, played bass in a punk band called Manufactured Romance.
In a statement released through police, his family said: "We are completely devastated and totally heartbroken by the tragic death of Nick on Christmas Eve.
"The family wishes to thank everyone for their kind tributes and ask for privacy to grieve at this very sad time."
Hampshire Constabulary has appealed witnesses to come forward.
Det Ch Insp Dave Brown said: "Investigations are continuing today as we work to establish the exact circumstances of this man's death.
"We would like to speak to anyone who was in or in the vicinity of the Rose Inn on Christmas Eve night."
A prison staff blogger, called Know The Danger, posted on Facebook: "Everybody loved Nick Medlin and respected him, and I can say hand on heart he was one of the best officers I have ever worked with in over thirty years. A true professional in every way."
A section of Pier Street was cordoned off for much of Christmas Day but has since reopened.


A Chinese boy trapped down an abandoned well has been found dead, after a huge four-day rescue operation.

The six-year-old fell into the 80m-deep well in Hebei province while harvesting vegetables on Sunday, state media Xinhua reported.
More than 500 rescuers and 100 excavators were involved after a call for help on Chinese social media by the boy's father.
Rescue efforts were hampered by soft soil which was prone to collapse.
Earlier reports had put the well at a depth of 40m.
The boy was found without signs of life after the search that took over 100 hours, according to a rescue official cited by the Global Times.
The 30cm-diameter well, which was too narrow for an adult to enter, was widened by rescuers who also pumped in oxygen.
The well had been left unused for five years and there were no warning signs.


A South Korean man who attacked the US ambassador to Seoul with a knife, slashing his face and arms, has been formally charged with attempted murder.

Prosecutors also charged Kim Ki-Jong, a nationalist activist, with assaulting a foreign envoy and obstruction of duty.
Police say Mr Kim wanted to highlight his opposition to joint military exercises with the US.
Mr Kim denies attempting to kill ambassador Mark Lippert, who received 80 stitches after the attack in March.
The envoy was targeted at a breakfast event in Seoul and spent several days in hospital, recovering from gashes to his face and hand.
Doctors said Mr Lippert's injuries could have been life-threatening if the cuts had been any deeper.
Mr Kim was tackled at the scene and arrested. Under South Korean law, the trial has to start within 14 days.
He could face life in prison if convicted of attempted murder, or even the death penalty, though that is rarely used in South Korea.
Prosecutors are also examining whether Mr Kim can be charged under a controversial National Security Law, which bans any praise or assistance for North Korea.
However, Mr Kim insists he was acting alone, rather than on the orders of Pyongyang.
Many anti-US activists such as Mr Kim favour reunification with North Korea and regard the massive US troop presence in South Korea as an obstacle to their aims.
The attack on Mr Lippert prompted rallies and prayer sessions in his support and in support of US-South Korea relations.
Kim Ki-jong's militant past


The economic benefits of more flights between Skye and central Scotland are being examined in a new study.

Loganair ran services from Ashaig Airfield, near Broadford, to Glasgow until 1988. Loch Lomond Seaplanes uses the strip for scheduled flights.
The economic study was recommended in 2013 by consultants who examined the costs of re-establishing a service.
The Scottish government said at the time that it had no plans to fund the return of flights to and from Skye.
Highlands and Islands Enterprise (HIE) has commissioned the new research.
Stuart MacPherson of HIE, said: "Strong reliable transport links are of course crucial to a successful and competitive region.
"Air services from and to small rural airports can play a key role in the communities they serve, creating a sense of connectedness, providing life-line services and supporting economic growth.
"Skye is served by the road bridge and by ferry services but it is over two hours from the nearest airport and at least a five hour drive to the central belt.
"We need to be clear about the full extent of the benefits of reintroducing a regular air service for the island and surrounding area as this will help inform the business case to re-establish the service."
The previous research, Skye Air Services Feasibility Study, looked at what would be needed before scheduled services could resume.
It suggested that resuming commercial flights could require capital spending of between £9.7m and £15.3m.
However, investment of only about £2.3m to £2.8m would be needed if the length and width of the small runway met with the Civil Aviation Authority's (CAA) approval.
Agreements would also have to be reached with the Department for Transport on security fencing,with airline operators on hangars and the fire service on what facilities it would require to keep costs down.
Capital expenditure would rise if the airstrip had to meet certain standards on runways, such as length, width and requirements on runway end safety areas.
The study was funded by HIE, Highland Council, which owns the site, and transport body Hitrans.
Ian Blackford, who was a spokesman for campaign group FlySkye and is now the local MP, told BBC Radio Scotland that he believed an agreement could be reached with the CAA to make the project affordable.
The strip was built in the 1970s by Army engineers, and appears briefly in a scene from the 1980 film Flash Gordon, which starred Sam J Jones, Max von Sydow, Timothy Dalton and Brian Blessed.
The air strip remains available to the emergency services and scheduled commercial flights.
Loch Lomond Seaplanes, flies up 200 flights per month between March and October, and carries about 10,000 passengers a year. It regularly operates scheduled flights from central Scotland to Skye.


Residents of a Highland town are to celebrate its past involvement in the weaving and knitting of fabric for stockings.

James Grant of Grant founded Grantown on Spey around the manufacture of linen 250 years ago.
On 14 May, residents and visitors will be asked to fill socks and stockings with donations. The footwear will then by hung on washing lines in the town.
The money will help to fund Grantown 250 anniversary celebrations.
A festival is to be held in the town, near Aviemore in the Cairngorms National Park, in June.
Celebrations were held last summer to mark the laying of the first foundation stones of Grantown on Spey in 1765.
They included a picnic which involved foods eaten by poor and rich people in the 18th Century.
Picnickers were offered the chance to "lunch like a laird or picnic like a pauper".