Working sprinklers inside a garbage enclosure at a Santa Rosa apartment complex may have helped prevent a much more serious blaze than the one Sunday morning that did about $5,000 in damage, Santa Rosa firefighters said. 

Fifteen firefighters and four trucks responded at about 9:45 a.m. Sunday to the apartment complex in the 1100 block of Fourth Street. Firefighters arrived to find smoke coming from an enclosed garbage room on the first floor of a three-story apartment building, firefighters said. 

The flames were contained to two dumpsters inside the garbage enclosure, where most of the damage was. Several apartments suffered minor smoke damage. 

Occupants of the building were evacuated for a short time while the fire was brought under control and the smoke removed from the apartments. No firefighters or apartment occupants were injured. 

It took firefighters about 15 minutes to put out the fire. 

A working fire sprinkler in the trash chute likely prevented flames to spread to the floor above the garbage room, firefighters said. 

The cause of the fire remains under investigation.