BILLERICA, MA — The Billerica Police Department responded this morning to Shawsheen Valley Technical High School to investigate a threat written on a bathroom stall.
At approximately 9:30 a.m., the school placed the building on a hold, requiring students and staff to remain in their assigned locations as Billerica Police conducted an investigation, including a search of the building.
As a precaution, the school conducted a controlled dismissal this morning, and all after-school activities have been canceled…