Violence against healthcare workers is on the rise as seen by an attack at a Pennsylvania hospital. A gunman took hostages before exchanges of gunfire that killed a police officer and wounded five other people at a York County,

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,

Investigators are still trying to determine why a man targeted a Pennsylvania hospital, taking workers inside the intensive care unit hostage and holding one staff member at gunpoint as her hands were bound by zip ties.