Strike Force Vulcan officers are seeking information relating to several suspicious scrub fires in the Camillo area between 1 and 10 December 2017.
The fires have been in the areas of Lake Road, Kendal Court, Camillo Road and Grovelands Drive.
Approximately 200 square metres of bushland has been burnt.
Strike Force Vulcan investigators are asking anyone in the above areas who may have seen any suspicious persons, vehicles or activity to contact police. Anyone with any information is urged to call Crime Stoppers on 1800 333 000 or make report online at www.crimestopperswa.com.au
Rewards of up to $50,000 are available for information that leads to the identification and conviction of an arsonist.