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 days leading up to the incident,

Days before a hostage situation turned deadly, a physician assistant says he spoke to the man who killed a police officer and wounded staff at a Pennsylvania hospital and told him his loved one had died.

A police officer was killed Saturday after responding to a shooting at UPMC Memorial Hospital just outside of Harrisburg, Pennsylvania, where the suspected gunman also was killed, according to state police.