The cause of an early morning fire in Oldcastle is listed as accidental.
Crews were called just before 5am to an industrial building in the 3500 block of Delduca Dr., not far from Provincial Road.
Tecumseh Fire Prevention Officer Bob Hamilton says the fire started in a storage area where a transformer malfunctioned and a light bulb burst.
21 employees were at work at the time and the building was evacuated.
Hamilton says the damage is minimal and the company is working to resume production as soon as possible.
No one was hurt.
--With files from AM800's Rusty Thomson and Teresinha Medeiros