A blaze in a nail salon in downtown Sonoma was quickly extinguished, mostly by the salon’s sprinklers, on Monday night.

Fire crews responded to the fire in Nail Pro at 201 W. Napa St. around 10:45 p.m., according to Spencer Andreis, battalion chief with Sonoma Valley Fire & Rescue Authority.

“When we arrived, the business was charged with smoke. It was starting to come out the front door,” Andreis said. “Crews forced entry through the front door and went to the back of the business” where the fire was burning, he said.

“The sprinkler system did its job. It took a minimal amount of water to suppress the parts that were still on fire at that point,” Andreis said. The fire involved just one room in the back of the nail salon.

Water from the firefighting efforts leaked out of the attic and under the floors, damaging two adjacent businesses, Chinese restaurant Happy Garden, and a hair salon, A New Image, the battalion chief said.

Damage to A New Image was confined mostly to the floor in the back of the hair salon.

There were no injuries. The cause of the fire is under investigation, Andreis said.

A fire broke out in the same nail salon in February, 2016, according to Andreis.

Heather Sarno, property manager of Crosspoint Realty Services, which manages the property, said it is usually the case that the insurer of an individual business must pay for fire damage, though “it depends on what the fire inspector determines to be the cause.”

Email Janis Mara at janis.mara@sonomanews.com.