April 25 (UPI) — Two police officers were wounded in a shooting Saturday at a Chicago hospital, leaving one of them in critical condition, officials said.

The two officers were shot at Endeavor Health Swedish Hospital on the north side of Chicago at around 11 a.m., the hospital’s parent company said on Facebook. Endeavor said the shooter was brought to the Emergency Department for treatment around 9 a.m. CDT Saturday in the custody of the officers. He was wanded and escorted by the officers at all times, Endeavor said. At around 11 a.m. he shot the officers and left the building. He was caught and is in police custody.

Law enforcement sources told the Chicago Sun Times that the shooter disarmed one of the officers before opening fire.

No patients or hospital staff were injured.

“The safety of our patients and team members remains our top priority,” Endeavor said. “We are cooperating with law enforcement during their investigation and our deepest compassion remains with the officers and their families.”

The condition of the other officer isn’t clear.

The hospital was locked down Saturday afternoon, but there is no ongoing threat.