Bakersfield firefighters were called again to the site of the old East Hills Mall overnight.
Investigators swept the mall Thursday afternoon following the fire early in the morning.
According to the Bakersfield Fire Department, they got the latest call just before 2 a.m. but the fire was out before they arrived.
Arson investigators found bundles of burned wires inside a stock room.
Fire officials say it is the twelfth response to the mall since it closed many years ago. There have been seven incidents there in just the last year.