An early morning car fire near Frenchmans Lane in Mount Clear quickly spread to the edge of a nearby timber plantation.
Four vehicles were called to the scene about 2am, as the fire spread to grass in the area, threatening plantation land near Whitehorse Road.
Fire investigators will inspect the scene on Sunday morning.
Police are also investigating, as the car is alleged to have been stolen.
Anyone with information is urged to phone Crime Stoppers on on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au
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