Pennsylvania State Police there have charged a 14-year old-student at Penns Manor Area Junior/Senior High School in Indiana County with a felony count of threat to use weapons of mass destruction and terroristic threats.
The teenage boy reportedly made the bomb threat on Monday.
A handwritten note had been left in a bathroom saying a bomb would go off that afternoon at 1:30.
School officials identified the student through security footage and say he was also carrying a pocket knife.
Students and staff were sent home so police could sweep the building. No evidence of a bomb was found.
The unidentified suspect was taken into custody, without incident, by troopers.