Crews worked to put out a house fire that sparked Monday afternoon in Carmel Valley.
San Diego Fire officials say they discovered the smell of smoke as they arrived in the 4700 block of Caminito Lapiz around 3 p.m.
Firefighters rushed to the back of the home, where the fire was growing. Crews determined the fire was coming from a mattress that had ignited.
They say the blaze is now fully contained right now, and the residents may be displaced.
Investigators are still trying to figure out the cause.