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.

A procession with law enforcement officers is planned for the funeral of a Pennsylvania police officer who was shot and killed while responding to an attack on a hospital intensive care unit.

Authorities described the shooting of a gunman who opened fire at a Pennsylvania hospital as “absolutely justified, beyond any and all doubt.”

One officer was killed and at least five others were were shot in a hostage situation at a hospital in York County, Pennsylvania, according to state officials.

Investigators are 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.

A police officer who was shot to death while responding to an armed man with hostages inside a Pennsylvania hospital intensive care unit was remembered Friday as a dedicated public servant who did not hesitate to run toward danger and died a hero.