A fire possibly started by an unattended candle on Friday night damaged an apartment building in the 1700 block of Mission Boulevard in Santa Rosa.

About 20 firefighters from Santa Rosa and Rincon Valley responded to the blaze, reported at 10:30 p.m.

They arrived to find a fire roaring on the second floor of an apartment. It took about 20 minutes to bring the blaze under control.

"During the fire, a dispute amongst the apartment's occupants led to a skirmish which was broken up by fire and police personnel," Battalion Chief Jack Piccinini said in a press release.

One resident received treatment at the apartment building for minor smoke inhalation.

Piccinini estimated the damage to building and contents at about $40,000. The fire and its cause remain under investigation.