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,

A police officer is dead, and the gunman was shot and killed Saturday after he took staff members hostage and wounded multiple people at a central Pennsylvania hospital, according to York County District Attorney Tim Barker.

A funeral service will be held later this week for the Pennsylvania police officer fatally shot while responding to a hospital intensive care unit where a gunman had shot three workers and taken