A sprinkler system extinguished a fire at a Renton apartment complex Tuesday night before it could spread, according to Renton Fire and Emergency Services Department.

The call came in at 8:06 p.m. as an activated fire alarm at the Benson Downs Apartments, 11000 S.E. Petrovitsky Road.

No one was injured, but three families were displaced from their water-damaged apartments, according to Renton Deputy Fire Chief Chad Michael. The American Red Cross responded to assist them.

Four units suffered water damage, with the unit where the fire started the most affected by water and some fire, according to Michael.

The fire was started by flower-shaped decorative lights resting on the carpeted floor in the dining area, he said.

Fire crews didn’t need to deploy their firefighting equipment but helped clean up the water damage.

Two engines, one ladder truck and two aid units responded to the fire.

Michael stressed that the sprinkler system kept the fire in check. “The sprinkler did its job and kept the impact to a pretty minimal amount,” he said. A damage amount wasn’t immediately available.

He noted that recent fires at apartment complexes in Renton grew in size because they didn’t have sprinklers.