ARSON Squad officers are investigating a suspicious fire in Wanneroo on Sunday. Police and firefighters were called to a home on Nannatee Way about 8.45pm. The fire destroyed one room and smoke substantially damaged the rest of the house. Anyone who saw any suspicious activity, persons or vehicles is asked to come forward. Rewards of up to $50,000 are available for information that leads to the conviction of an arsonist. Call Crime Stoppers on 1800 333 000.