Rewards of up to $50,000 are available for information that leads to a conviction for an arsonist involved in a vehicle and bridge fire at Wonnerup on Wednesday March 25, 2020.
Between 11am and mid to late afternoon, a silver Subaru Impreza sedan was stolen from a residence in Geographe.
Around 5pm the vehicle was set alight on Tuart Drive in Wonnerup, which subsequently caused a significant amount of damage to the wooden bridge structure.
A blue Hyundai Tucson wagon was seen driving in the vicinity of the fire around 5pm.
Busselton Detectives would like to speak to anyone who may have seen the Subaru Impreza between 11am and 5pm Wednesday 25 March 2020 in the Geographe and Wonnerup vicinity.
Investigators would also like to hear from anyone who may have seen the Hyundai Tucson wagon, which was seen in the Wonnerup area around 5pm on Wednesday 25 March 2020.
Anyone with information in relation to the vehicles movements, those driving the vehicles and any information about the fire, are asked to contact Crime Stoppers crimestopperswa.com.au or ring 1800 333 000.
All reports to Crime Stoppers can be made anonymously.