"Multiple shots" were fired after the gunman opened fire in the hospital's car park, a spokesman for the Chicago Police Department said.
Shots were fired at a 2nd CPD officer in the Mercy Hospital Shooting, but he wasnt injured. Instead, the bullet struck his holster and embedded itself in his gun:
As police arrived at the scene, the shooter fired at officers before they exited their cars, Johnson said.
The gunman exchanged gunfire with police for several minutes inside the hospital, Johnson said.
Woman who heard the Chicago hospital shooting: You cant go to the hospital, you cant go to school, you cant go to church, you cant go to the grocery store. You cannot go anywhere...You just never know when you walk into a place if youre going to come out alive
Media playback is unsupported on your device Media captionEyewitness at the cancer centre: 'I was in the gunfire and had to duck down' Four people have died in a shooting at a Chicago hospital, including two female members of staff and a police officer, and the gunman himself.
The NRA told doctors to stay in their lane and now there’s a shooting at Mercy Hospital in Chicago. Doctors can be patients and victims of gun violence too. We’re all in this together as human beings who just want to live and come home to our families. Enough is enough.
BREAKING: Police: Suspected gunman dead, officer and 3 others in critical condition following shooting at Chicago hospital.
Jimenez, from the 2nd District, joined the force in February 2017 and had just finished his probationary period as an officer, police Supt. Eddie Johnson said at a Monday night press conference.
"Chicago lost a doctor, pharmaceutical assistant and a police officer, all going about their day, all doing what they love," said Mr Emanuel.
Gray said he saw a man and a woman talking to each other before the man pulled a gun and shot the woman and then began shooting others at the hospital, which is about 25 blocks south of the Chicago Loop.
Officer Samuel Jimenez, on the force less than two years, was gunned down as he went to the aid of other officers who had been called to Mercy Hospital & Medical Center around 3:20 p.m. about an assault. Jimenez, 28, was married with three small children
People evacuate a hospital in Chicago, where police say there are multiple victims, including a police officer, injured in a shooting.
HOSPITAL SHOOTING - Mercy Hospital in Chicago - Started at 4:18 p.m. ET - Multiple victims, including officer - Possible suspect down - No word on motive
A police officer and two female staffers were killed in a shooting at a Chicago hospital on Monday afternoon.
Chicago Police Officer Samuel Jimenez was shot and killed after he responded to calls of an active shooter at Mercy Hospital and Medical Center, Police Superintendent Eddie T. Johnson said Monday night.
Police spokesman Anthony Guglielmi later confirmed "with profound sadness" that an officer named as Samuel Jimenez had died in hospital of his injuries.
A police officer is in critical condition in a shooting at a Chicago hospital, officials say. At least one offender has been shot and there are reports of multiple victims.
The officer who was shot at but escaped injury during the incident shared images of a bullet embedded in the side of his gun, Chicago news broadcaster ABC7 reported.