Excerpts from wgntv.com:

Police responded to the scene at Mercy Hospital and Medical Center at 2525 S. Michigan Ave. for reports of shots fired just before 3:30 p.m. Monday.

A Chicago police officer, an emergency room doctor, and a first-year pharmacy resident, were all killed in the attack. The gunman, Juan Lopez, 32, also died, but it is unclear whether he died from police gunfire or a self-inflicted gunshot wound.

The shooting was a domestic incident, and the gunman’s first victim was an ER doctor with whom he had previously had a relationship.

The Chicago Police Department has identified the slain officer as 28-year-old Samuel Jimenez. He joined the department in Feb. 2017 and just recently completed his probationary period to officially become a full-fledged officer. Jimenez was married and the father of three children. Jimenez was killed during a shootout with Lopez and was the second officer to be killed in the line of duty this year.

Tamara O’Neal, 38, an emergency room physician, was known as very charitable and deeply religious. She had broken off her engagement to the gunman, Juan Lopez, back in September. They had been arguing in the hospital parking lot before he displayed a handgun and fatally shot her.

Dayna Less, 25, a first year pharmacy resident, had recently graduated from Purdue University and started working at Mercy Hospital in July. Less was planning a wedding next year in Indiana. Less was killed as she was getting off a hospital elevator.