NEWTOWN, Conn. (AP) — Visitors have been barred from Newtown High School for the afternoon after school officials discovered a threat on social media.
Schools Superintendent Joseph Erardi sent an email to parents Tuesday notifying them of the lock-in at the high school.
Related Content: Superintendent Joseph Erardi’s email to Newtown parents
The lock-in allows classes to continue on a normal schedule, but increases security and prevents visitors from entering the building.
The threat follows an evacuation last month at the temporary Sandy Hook Elementary School in Monroe following a threat received there.
A December 2012 shooting at the former Sandy Hook school building left 20 students and six staff members dead.
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