Militants launched a gun and bomb assault killing at least six people in Indonesian capital Jakarta on Thursday.

Police said the attack followed a threat by Islamic State fighters to put the country in their “spotlight”, as Reuters reports.

Local media said six bombs went off and a Reuters witness saw three dead people and a gunfight going on. One explosion occurred in a Starbucks cafe and security forces were later seen entering the building. Another target was a  police station, next to a busy shopping center, the Sarinah Thamrin Plaza.

Police say four suspected attackers are among at least six people killed, but it is not yet clear what group is responsible for the deadly attacks.

President Joko Widodo condemned the “act of terror”, but also called for calm: “We all are grieving for the fallen victims of this incident, but we also condemn the act that has disturbed the security and peace and spread terror among our people,” .

Earlier police had said they suspected a suicide bomber was responsible for at least one of the blasts and up to 14 militant gunmen were involved in the attack, Metro TV reported.