A fire, caused by welding sparks which ignited the filters of a spray booth ventilations system at an auto body shop, was largely contained by the business' sprinklers on Tuesday.
The Bismarck Fire Department was dispatched at about 4:23 p.m. to the 1800 block of Commerce Drive, where heavy smoke was showing from the shop area of the single-story building.
Fire had spread to the roof top HVAC system, but flames inside the shop had been extinguished by the activation of two heads on the fire sprinkler system, according to Owen Fitzsimmons, a fire marshal with the Bismarck Fire Department, who deemed the incident was accidental.
Fire crews removed a roof top ventilation fan and a portion of the roof to access and extinguish the blaze. Afterward, a thermal imaging camera was used to scan for any fire spread, and firefighters left the scene at about 7:24 p.m.
Bismarck Police Department assisted with scene control. Metro Area Ambulance was on scene to provide assistance.
There were no injuries to building occupants or firefighters. The sprinkler system has been reactivated, the business remains in operation.