Office Building, Other Business San Luis Obispo, CA – Office building fire kept in check by sprinkler system; No injuries September 13, 2016 viking210 Firefighters responded to a fire that burned through the stairs in the back area of a San Luis Obispo office complex Sunday morning, said San Luis Obispo City fire Chief Garret Olson. Just after 11 a.m. firefighters responded to smoke in the area of the 1200 block of Higuera Street, Olson said. Firefighters arrived on scene at the two-story office complex and found a small fire in the back area that had burned through the stairs and down into the office area. A fire sprinkler overhead held the damage in check until firefighters arrived, Olson said. The fire damage appears to be confined to the stair area, and there is smoke damage throughout the building, he said. The cause of the fire is undetermined and appears to be accidental, San Luis Obispo City fire Engineer Mathew Polkow said. He added that the fire appears to have started inside of the staircase. No one was injured in the fire.