Officials say the multiunit apartment’s fifth floor sprinkler system contained the fire before crews arrived at the scene, located at 1630 Main Street.
Crews said the fire was contained to one apartment and they made sure the fire was promptly extinguished.
The fire displaced two families who were given temporary shelter by a CT Transit bus. The American Red Cross is working to assist the displaced families.
Officials say no one was injured and the incident is under investigation.
