Police want to speak with the owner of a grey Ford Faclon, spotted near the scene of a suspicious fire in Perth's east yesterday.
More than 4,000 hectares of land was yesterday destroyed by the suspicious blaze in Sawyers Valley
The early 2000's Falcon was seen on Gorrie road around Hancock Brook.
A reward of up to $50,000 is on offer for information which leads to the identification and conviction of an arsonist.
If you have any information, contact crimestoppers on 1300 333 000.