Investigators: Massive California Wildfire Started by Malfunctioning Vehicle

California investigators say they’ve figured out what started the Riverside County wildfire that’s already torched more than 26,400 acres.

The blaze, which began Friday, began when a vehicle with a faulty exhaust system released burning carbon from its tailpipe, igniting dry brush in Cherry Valley, the California Department of Forestry and Fire Protection revealed late Monday. Forestry officials are asking anyone with information on the vehicle and its driver to contact authorities.