Two killed in U.S. hospital shooting Police officers and medical personnel transport the wounded at Western Psychiatric Institute and Clin...

Two killed in U.S. hospital shooting

Police officers and medical personnel transport the wounded at Western Psychiatric Institute and Clinic in Pittsburgh, U.S. state of Pennsylvania, March 8, 2012. A mass shooting on Thursday at Western Psychiatric Institute and Clinic has killed two people and wounded seven others, according to a report by local TV station WPXI-TV. (Xinhua/AP Photo)

Police officers and medical personnel transport the wounded at Western Psychiatric Institute and Clinic in Pittsburgh, U.S. state of Pennsylvania, March 8, 2012. A mass shooting on Thursday at Western Psychiatric Institute and Clinic has killed two people and wounded seven others, according to a report by local TV station WPXI-TV. (Xinhua/AP Photo)

A mass shooting on Thursday at Western Psychiatric Institute and Clinic has killed two people and wounded seven others, according to a report by local TV station WPXI-TV.