Motive behind Pennsylvania hospital shooting remains unknown
Investigators released no new information Sunday about a possible motive for the shooting at UPMC Memorial Hospital in York ...
Motive in Pa. hospital shooting unclear, officials say man had contact with ICU
The man who authorities say entered a Pennsylvania hospital with zip ties and a pistol over the weekend had recent contact ...
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Motive still unclear in US hospital attack that left one police officer dead
Investigators are trying to determine why an armed man targeted a hospital in the US state of Pennsylvania, killing one officer and injuring several ...