Libertyville Fire Department officials said a recently installed sprinkler system at a house on the 400 block of Butterfield Lane kept a garage fire from spreading to the interior of the home Tuesday morning.

Firefighters were alerted by the residents at about 9 a.m. after they discovered smoke in a back room of their attached garage.

The home’s sprinkler system extinguished the fire and kept it from spreading to other parts of the home, officials said.

The cause of the fire remains under investigation. The residents were allowed to return to the house.

No damage estimate was available.