A man who took hostages in a Pennsylvania hospital during a shooting that killed a police officer and wounded five other people highlights the rising violence against U.S. healthcare workers and the challenge of protecting them.

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 49-year-old gunman was shot and killed by police after they said he held multiple UPMC staff members hostage and shot multiple people.