CCTV has been released of two people deliberately setting a police car on fire in Mandurah.
The marked car was parked at a vehicle dealership on the corner of Anstruther Road and Pinjarra Road around 4.30am on Friday.
Footage shows two people approaching the dealership on foot before pouring an accelerant over the vehicle and igniting it with a butane torch.
The police car was damaged beyond repair.
Police believe one of the offenders may have suffered burns to their face and arms.
Arson Squad investigators urge anyone who has mobile phone or dash-cam vision of the area between 4am and 5am, or who has information relating to this fire, to call Crime Stoppers on 1800 333 000 or report online at www.crimestopperswa.com.au.
Rewards of up to $25,000 are available for information that leads to the identification and conviction of an arsonist.