Honolulu fire officials say the fire that damaged the garage of Hawaii Five-0 actor Alex O'Louglin was an accidental spontaneous combustion.
Fire officials say oily rags in the garage caught fire. They were being used in a wood treatment project.
The fire caused about $110,000 dollars worth of damage to the Diamond Head home Monday. A neighbor reportedly smelled and head the explosion before calling 911.
Fire crews were able to contain and extinguish the blaze.
No one was injured.