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

The man who authorities say entered a Pennsylvania hospital with zip ties and a pistol over the weekend had recent contact ...

A man who took hostages in a Pennsylvania hospital during a shooting that killed a police officer and wounded five other ...

The man who authorities say entered a Pennsylvania hospital with zip ties and a pistol over the weekend had recent contact ...

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

Family members of patients at UPMC Memorial Hospital are waiting across the street from the facility hours after a gunman ...

Authorities say a shooter entered UPMC Memorial Hospital's ICU and took staff members hostage before he was killed by police ...