Roosevelt Middle School in New Britain was locked down until afternoon Monday after a handgun was stolen from a vehicle.
Police learned a handgun was taken from a car on Austin Street when a larceny was reported around 8:30 a.m.
Police said they were concerned the gun might have been tossed on or near school property so they are searching the grounds as a precaution.
The school was placed on lock down because of its proximity to the incident, police said. Nothing was found and the lockdown was lifted just before 2 p.m.
Police are still investigating.