Police block the rear entrance to the Western Psychiatric Institute and Clinic on the University of Pittsburgh campus, Thursday, March 8, 2012 in Pittsburgh. There were reports of gunfire at the ... more 
Police block the rear entrance to the Western Psychiatric Institute and Clinic on the University of Pittsburgh campus, Thursday, March 8, 2012 in Pittsburgh. There were reports of gunfire at the psychiatric clinic injuring several people, and police were looking for a gunman. (AP Photo/Keith Srakocic) less 
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Associated Press | Photo By Keith Srakocic
Thu, Mar 8, 2012 4:28 PM EST