A Friday night fire that started in a Naperville garage spread to the attic caused $150,000 in damages and left the house uninhabitable.
Naperville Fire Department inspectors on Saturday were trying to determine what caused the fire at 1523 Ada Lane.
According to fire department officials crews responded to a fire in a detached garage behind the house and found heavy smoke and flames and heard a possible explosion, possibly from racing fuel stored in the burning garage.
By the time crews reached the garage the fire had spread to a first floor bedroom and the attic of the home.
Both fires were extinguished in less than 20 minutes.