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.

The first call came in to 911 at 10:43 a.m. The threat has been neutralized, and an investigation is underway, he said.Start the day smarter. Get all the news you need in your inbox each morning.

Family members of patients at UPMC Memorial Hospital are waiting across the street from the hospital as a memorial grows at the West York police station in memory of the officer killed during a shootout in the ICU.