IOWA CITY (AP) — A bright but troubled University of Iowa graduate student opened fire on police responding to a domestic disturbance at a trailer park, injuring three officers before he was killed by gunfire, a sheriff said Monday.

Taleb Hussein Yousef Salameh, 28, was killed Sunday evening after North Liberty police officers responded to a 911 call at a mobile home at about 6 p.m., Johnson County Sheriff Lonny Pulkrabek said. Officers made contact with Salameh and a female victim, and “gunshots were exchanged between officers and Salameh,” who was killed at the scene, he said.

Three North Liberty police officers were struck by Salameh’s gunfire and transported to University of Iowa Hospitals and Clinics for care. All three were treated and released. The female victim was not harmed in the shootout, and nobody else was home at the time.