A gunman took hostages at UPMC Memorial hospital in Pennsylvania, killing one police officer and injuring five others before being killed by police. The gunman entered the hospital's intensive care unit and took staff members hostage. A nurse and custodian were shot and wounded, and a doctor was grazed. The suspect and police exchanged gunfire after he held a staff member at gunpoint. One officer was killed, while two others and the injured staff members are in stable condition.