Police are hunting two people who allegedly stole a motorbike before setting it on fire in Bertram.
The motorbike was taken from a unit complex in Cockburn Central around 2am on Friday, March 1.
About 30 minutes later, the stolen bike was set alight in bushland on Holden Close in Bertram.
The blaze burnt through two hectares of land.
As inquiries continue, detectives have released CCTV footage of two people on motorcycles who may be able to assist with the investigation.
Anyone with information in relation to this incident, or the identity of those pictured, is urged to contact Crime Stoppers on 1800 333 000 or online via www.crimestopperswa.com.au.
People reporting information to Crime Stoppers may remain anonymous if they wish.
Rewards of up to $25,000 are available for information that leads to the identification and conviction of an arsonist.

Pop-up ice skating rink glides back into Mandurah for winter school holidays
Federal opposition leader Angus Taylor sits down with local business owners in Mandurah
Police search for missing man last seen leaving Rockingham Hospital
West Aussies urged to be on high alert after surge in winter house fires
New $3.4 million boardwalk to be constructed at Lake Clifton thrombolites
City of Mandurah rolls out new tactile bin lids, accessibility stickers to support residents with low vision
Driver dies in hospital after Australind crash
Welfare concerns for woman with dementia last seen in Cooloongup
Charges laid over fatal West Coolup crash
