UPDATE (4:46 p.m.) - San Luis Obispo police and fire officials are investigating a late-night house fire as a case of arson.
The fire broke out just after 11 p.m. Tuesday at a house in the 1300 block of Buchon Street.
Emergency crews arrived to find the front of the house engulfed in flames.
The four adults who lived in the home got out safely.
Investigators believe the fire was set intentionally.
They're asking neighbors in the area of Buchon and Johnson Ave. who have surveillance cameras to contact police Det. Jeff Koznek at (805) 594-8005.
(12:53 a.m.) - Late Tuesday night, a fire broke out on the exterior of a San Luis Obispo home.
Firefighters first received word at 11:05 p.m. SLO City Fire said they knocked down flames within 15 minutes of being on the scene.
The fire began reportedly on the exterior of the home and spread into the attic. Officials said they kept the flames contained to the origin.
The four residents were uninjured and have found lodging for the night.
The cause of the fire is unknown.