A suspected suicide bombing outside police headquarters in the Indonesian city of Medan killed one perpetrator and injured several officers on Wednesday morning.

The Chief of the Public Information Bureau of the National Police Brig. Gen. Dedi Prasetyo said at least six people were wounded, including four police officers and two civilians, in the attack targeting the police station in North Sumatra province.

“Six people suffered minor injuries and currently being treated at the Bhayangkara Hospital in Medan,” Prasetyo said during a press conference in Jakarta.

A perpetrator who wore a jacket was killed at the scene.

Read more: Blast at police headquarters kills 1 in Indonesia