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,

West York Borough Police say the officer died in a shooting at the UPMC Memorial Hospital. The gunman is also dead, authorities say.

A police officer and the gunman are dead after a shooting at a hospital in York, Pa., Saturday morning, officials confirmed in a statement.

Police responded to an active shooter incident at a hospital in York, Pennsylvania, on Saturday morning and there is no ongoing threat, officials said.

A gunman, armed with a handgun and carrying zip ties, went inside UPMC's ICU, and took staffers hostage before he was ultimately killed by police in a shootout, the York County DA said.