A fire at a self-storage facility in Tucson, Ariz., has been ruled accidental by fire department investigators.
The blaze at U-Store-It self-storage on Ruthrauff Road near La Cholla Blvd. began about 6 a.m. Two storage units were destroyed and several others were damaged. Firefighters had trouble entering the storage units because the units were locked with round metal locks, which are difficult to remove. Rather than cut the locks, they used a rotary saw to cut open the metal doors.
Fire investigators believe spontaneous combustion from something inside one of the units led to the fire.