Four people, including one policeman, are dead following a series of explosions and a firefight in central Jakarta.
Police confirmed the fatalities to CNN, saying that one policeman and three civilians were killed. It is not confirmed if the dead civilians are the gunmen.
At least one explosion happened outside a police station at a busy intersection in central Jakarta, which was also the scene of the gun battle.
Amateur video, posted on Twitter, appears to have caught one of the explosions outside a coffee shop in the Sarinah area.
Police spokesman Anton Charliyan told CNN that a number of grenades were used in the attack, although no buildings around the police station appear to have been damaged.
Bob Behr, CNN security analyst, said that a conversation with jihadists revealed that ISIS’ plan is to “sow chaos” and that the attack has the signature of ISIS.
Thursday’s attack “sounds like the Paris attack to me,” Behr said, in that the attackers were coordinating attacks and using bombs and automatic weapons. A lot of these fighter are getting combat experience in Iraq and Syria, many of whom have experience handling and detonating explosives.
Jeremy Douglas, of the U.N. Office on Drugs and Crime, said he understood that there were a number of gunmen holed up in the Skyline Building, near a Starbucks coffee shop in the neighborhood.
There have so far been no claims of responsibility and police have not named any suspects.
The country has been on high alert in recent weeks, with the police and military joint operations, focused on hitting the East Indonesian Mujahadeen, which has pledged support for ISIS.
Around 500 Indonesians have gone to Syria, Douglas says, and there is a big concern locally about foreign fighters returning from the Middle East to perpetrate attacks at home.