A stolen utility was set on fire in Lardner Rd, Drouin on Tuesday night.
Police said the white Toyota Hilux was stolen from Longwarry before the 8pm fire.
A witness reported seeing three people standing and laughing near the vehicle, police said. They were allegedly seen lighting a small fire under the vehicle, which was quickly engulfed in flames.
The CFA attended and noted the utility's lights were still on and engine ticking over.
Such was the heat of the fire, police reported the back aluminium tray melted.
Anyone with information is urged to contact Warragul Police on 5622 7111.