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.

An officer was killed and multiple people were injured in a shooting reported at UPMC Memorial Hospital on Innovation Drive and Roosevelt Avenue in York County on Saturday afternoon.West York Borough Police say one of their officers has been killed.

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

The shooter has been identified as Diogenes Archangel Ortiz. He allegedly entered the hospital with a handgun and zip ties.

A memorial is growing as a Pennsylvania community mourns the loss of a police officer on Saturday. The officer was killed in the line of duty when a gunman opened fire inside the UPMC York Memorial Hospital.

Three UPMC Memorial Hospital workers and three police officers were shot — one of them fatally — in what York County District Attorney Tim Barker described as an attempted hostage situation Saturday morning.

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UPMC released a statement on social media saying the hospital is "now secure" and that law enforcement is managing the situation.