A University of Cincinnati Hospital security officer's injuries are "very serious" after he was shot near the entrance of the psychiatric emergency services wing of UC Hospital, according to Cincinnati Police Department Chief Eliot Isaac.

The suspect fatally shot himself, Isaac said. The suspect "has not been identified -- we're not certain if he's known to any of the employees or medical staff."

At 2:19 p.m., UC Health tweeted "police responded to an active shooter this afternoon at the UC Health Business Center. Suspect is down. Employees should remain in their areas. Visitors please avoid the area if possible," WCPO TV reports.

Isaac said CPD officers responded to the scene within two minutes. The suspect fired at one responding officer, but the officer was not struck and did not return fire, Isaac said.