Two people, including a police officer, were killed and two others injured in a shooting at an entertainment venue in Küçükçekmece district of Türkiye's Istanbul city.

The incident occurred at around 3:40 a.m. (GMT+3) on İkitelli Street in the Atatürk neighborhood, according to Evrensel.

A man entered a music hall and opened fire for an unknown reason. A police officer who was at the venue while off duty returned fire.

Both the officer and the attacker sustained critical injuries and died at the scene. Two other people were also wounded.

Police reviewed security camera footage and questioned employees at the venue as part of the initial investigation. The bodies of the two deceased were later taken to the morgue of the Institute of Forensic Medicine.