A gunman opened fire at a Chicago hospital on Monday, shooting three people, including a cop.
Police responded to Mercy Hospital after reports of shots fired at the location at around 3:30 p.m., according to Chicago police.
“A #ChicagoPolice officer has been shot in the active shooter incident at Mercy Hospital,” tweeted Chicago Police spokesman Anthony Guglielmi. “He is in critical condition but receiving excellent care.”
In addition to the officer, two women were shot, one fatally
The woman killed was a doctor at the hospital and the gunman’s former fiancee, according to ABC Chicago. Another woman was shot and injured in the hospital, the network said.
The gunman was then shot by a police officer.
A witness described how the gunman went on his rampage inside the building.
“I heard shots fired, I turned around to my right and I see a man shooting someone on the ground — shot him multiple times,” the witness told CBS Chicago.
“Then almost immediately an officer was already coming in… He exchanged fire with them, and then reloaded, shot the person on the ground again, and then made himself inside the hospital and more shots fired.”
The names of the victims and the shooter were not released Monday night.
This report originally appeared on NYPost.com.