Several unexplained blazes have been started in a 10-day fire blitz in Greater Dandenong this month.
On February 11 between 11pm and midnight, a wheelie bin in Sylvia Street, Dandenong North, caught fire after being put out for collection.
About 11.30am on February 22 in Gunther Avenue, Springvale, a shed full of old newspapers caught fire.
Between 8-9.45pm the next day a couch, which was put out for recycling in McFees Road, Dandenong North, also caught fire.
Police said the blazes were not related.
Information about the fires can be phoned to Crime Stoppers, 1800 333 000.