SUDBURY (CBS) – Lincoln-Sudbury High School was temporarily placed into lockdown Monday afternoon after a teacher found two shell casings in the school.
School officials, in letter to parents, said the casings, which were from bullets that had been used some time in the past, belonged to a .22 caliber gun. They said the casings were likely brought into school and dropped onto floor, but they closed the school to ensure no gun was brought into the building.
Students were asked to remain in the school while officials inspected backpacks. At about 3:35 p.m. students were released to go directly to the buses or allowed to go home without going to their lockers.
After the students were dismissed, officials searched all of the lockers in the school. They did not find any weapons or more ammunition. It is unknown how long the casings were in the classroom before they were discovered.
Superintendent and Principal Scott Carpenter asked parents to talk with students about the situation.
“Be it a small knife on a keychain or today’s shell casings, we take these things seriously. We have to,” said Carpenter in the letter.
Sudbury Police officers are investigating.