Four people are dead, including an ER doctor and a police officer, after a gunman killed his ex-fiancee and two others at Mercy Hospital in Chicago this morning.
The 32-year-old gunman, identified by sources as Juan Lopez, and his ex-fiancee Dr Tamara O'Neal are among the dead.
Chicago police officer Samuel Jimenez, 28, was also killed in the shooting. Jimenez, a married father-of-three, had only just completed his probationary period, the Daily Mail reported.
The second woman who was shot by Lopez was a pharmaceutical technician at Mercy Hospital. Her name has not been released.
O'Neal, an ER doctor at the hospital, was reporting for work when she was confronted by Lopez just before 3.30pm local time.