A residential fire Saturday afternoon in Brentwood was contained to a garage and had largely been extinguished by a sprinkler system by the time firefighters gained access, East Contra Costa Fire Protection District officials said.

The fire, reported about 3:30 p.m. at 2719 Reddington Way, activated two sprinkler heads in the garage.

The fire caused minor damage to the contents, while the sprinklers caused moderate water damage to the garage, officials said.

The cause of the fire is undetermined.