A shooting at a suburban Philadelphia hospital campus on Thursday has killed one worker and injured two other people, The Associated Press reported.

Prosecutor Jack Whelan told the AP that one of the injured is the gunman.

The shooting happened at Mercy Fitzgerald Hospital in Darby, Pa., the Yeadon Police Department told the AP.

A hospital spokeswoman told the AP that the shooting was reported at its wellness center, which is attached to the hospital by a pedestrian bridge.