A mass shooting at UPMC Memorial Center has left the gunman and a police officer killed and multiple hospital staff injured.

A man who took hostages at UPMC hospital during a shooting that killed a police officer and wounded five others highlights ...

A man armed with a pistol and carrying zip ties entered a Pennsylvania hospital’s intensive care unit Saturday and took staff ...

A 49-year-old gunman was shot and killed by police after they said he held multiple UPMC staff members hostage and shot ...

Officials say 49-year-old Diogenes Archangel-Ortiz had recent contact with the intensive care unit "for a medical purpose ...

Anguish and anger at the very recent loss of a loved one apparently spurred on the man who would target the intensive care ...

Lester Mendoza, a physician's assistant at UPMC Memorial Hospital in York, said he helped tell the shooter a loved one had ...

Officer Duarte had just celebrated his 30th birthday on Feb. 17, less than a week before Saturday’s shooting, according to ...

A senior law enforcement official informed on the inquiry told ABC News that the gunman who targeted the intensive care unit at the UPMC hospital in Pennsylvania on Saturday morning was reportedly ...

A gunman who held medical staff hostage before killing a police officer and wounding five others at a hospital in south-central Pennsylvania Saturday is believed to have visited the facility in the ...