A central Massachusetts high school was locked down Monday morning after state police said a live ammunition round was found in a school bathroom.
The shelter-in-place has since been lifted and classes have resumed.
Troopers are on the scene assisting with a search of North Brookfield High School.
State police said there wasn't a threat to students, but everyone inside the building was told to remain in place.
State police are assisting North Brookfield police in the ongoing investigation.
Stay with necn and www.necn.com as this story develops.
