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ROBINSON TOWNSHIP (KDKA) — Police are investigating a threat made at Carlynton Junior-Senior High School in Robinson Township.

Graffiti reading “Sept 26 CHS goes Boom!” was found in a high school restroom stall on Friday after school.

Carlynton School District Superintendent Gary Peiffer says Robinson Police and principals are investigating.

carlynton Police Investigating Threat At Carlynton Junior Senior High School

(Photo Credit: KDKA)

Police will conduct a search of the building overnight on Tuesday. The building will be locked down until Wednesday morning.

A volleyball game scheduled for Tuesday night will be rescheduled or moved.

Robinson Police will also be at the school on Wednesday for added safety and security.

A full letter to parents can be read on the school district’s website.