PITTSBURGH (Newsradio 1020 KDKA) - It was a threat to shoot up Plum High School that prompted the school district to close all schools Monday as a precaution.
Police Chief Lanny Conley tells the Tribune-Review there are possible leads as to who made the threat but they have not yet identified anyone.
The threat was reported to police Sunday morning after a tip on the Safe2Say Something website.
The year before, there were six threats in two months.
Several students were charged with crimes.
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