The department issued the following statement: "Our West York Borough family is suffering a painful loss today in response to a tragic mutual aid call earlier today in West Manchester Township at UPMC.

UPMC announced this morning via a Facebook post that it has closed Memorial Hospital in West Manchester Township to visitors in the wake of a hostage incident Saturday that left one police officer dead, two injured and several staff members injured. The health care system did not say when visitors to patients would once again be welcome.

"We know that families and visitors are vital to helping patients heal, and we are working toward making visitation possible again."