Police are appealing for witnesses to a fire that has destroyed vehicles and property at a business in Coldstream on the morning of Monday 13 January.
Emergency services were called to the Station Street address just after 12.30am following reports of loud explosions.
On arrival, two heavy vehicles were on fire with flames spreading to a nearby paddock.
The flames were eventually brought under control just before 1.30am.
No one was injured during the incident and the exact cause is being investigated but it is being treated as suspicious at this stage.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au