According to the semi-official Tasnim news agency, one police officer was killed and three others injured when armed individuals opened fire on a patrol in the southeastern Iranian city of Zahedan.

First Sergeant Mohammadreza Nezamdoost was killed in what officials described as a “terrorist attack,” while three other officers were wounded, The Caspian Post reports, citing foreign media.

The attack occurred while the patrol was securing the area, Tasnim reported.

Efforts to identify and apprehend the assailants are ongoing, and further details are expected to be announced later.