Photo: heraldsun.com.au

Emergency services were called about 3.30am and on arrival found the interior of the business completely alight.

No one has been injured.

Police are investigating but are currently treating the fire as suspicious.

It follows an incident on Monday where two cars and a caravan, parked in the forecourt of the same factory, were completely destroyed by fire, while an office in the factory was broken into.

Police will investigate whether the two incidents are linked.

Anyone with information about the incidents is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au.