A shell casing was found in a middle school in Vernon on Thursday.
A student found an empty shell casing in the stairway at Vernon Center Middle School on Hartford Turnpike at the end of the school day, police said.
Vernon police responded to the scene and are actively investigating how the casing ended up at the middle school.
Police were present during school dismissal and as a precautionary measure, Vernon police and school officials are taking extra steps to ensure safety.
An initial investigation found no specific threat to Vernon Center Middle School or its students and staff.
No other details were immediately available.