Investigators were on scene at the former Wiard Plow factory building this morning with a backhoe in an attempt to dig into the rubble and find the origin of Saturday's fire.
Digging started in the same location as the first fire on Saturday because, Lt. James Steinbrenner said, photos taken early in the second fire show that area as the hottest spot.
The backhoe was being used to remove the largest pieces of debris, and then investigators would use hand tools to dig down to the floor level.
Once the origin of the fire is located, investigators hope to determine the cause of the fire.