The arson squad is looking for the person responsible for sparking a bushfire in an Ellenbrook reserve.
The blaze broke out in bushland on Farmaner Parkway around 2:30pm yesterday and burnt through four hectares before it was brought under control.
Detectives would like to speak to anyone who lives in the area or was in the vicinity of the above area who may have seen any suspicious people, vehicles or activity in the area around the time of the fire.
Anyone with information regarding this fire is asked to call Crime Stoppers on 1800 333 000 or make a 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.