ISIS Daesh claimed responsibility for a four-hour siege in the heart of Indonesia’s capital  on Thursday that killed seven people, including five attackers.The brazen daylight assault also injured 24 people as attackers detonated explosions and waged armed battles with police around a busy shopping area in downtown Jakarta.

ISIS issued a statement through social media saying the group’s “soldiers” were behind the attack, which it said targeted Westerners from countries fighting the terror group in Iraq and Syria.The claim came after several Indonesian officials blamed ISIS Daesh for the siege, with Jakarta’s police chief naming a regional ISIS Daesh figure as the suspected ringleader.

Downtown Jakarta was turned into a battlefield as the attack unfolded. The U.S. Embassy told citizens to “shelter in place,” saying later that no Americans were caught up in the attack but that “further incidents are possible” and the embassy would be closed on Friday.

The siege began at around 10:45 a.m. local time Thursday (10:45 p.m. Wednesday ET) at a busy intersection near a police station and a Starbucks, according to Jakarta police spokesman Col. Muhammad Iqbal.