Fire investigators continue to sift through the charred remains of the former Tri-Valley Growers cannery in Turlock looking for a cause.
The fire was reported Friday afternoon just before three. Officials say firefighters arrived to find the middle part of the building fully involved.
The fire follows an incident in which witnesses say a truck on the property was lit on fire Thursday night.
Investigators were on scene Saturday making sure the fire was completely out and that their were no bodies in the debris.
No damage estimate is available. The owner of the property says he plans to secure the area with a fence and security guards.