Indonesian police say a suicide bomber attacked a police station in the small Indonesian city of Solo on Tuesday, killing himself and wounding a police officer.

Shortly after the attack, President Joko Widodo, who is from Solo and a former mayor of the town, ordered the police to arrest those that may have been connected to the suicide bomber. He also urged for the people to stay calm.

The identity of the bomber was not immediately clear, but the country's intelligence chief said he suspected the attacker was a supporter of the Islamic State.