Update: WA Police have confirmed the two victims in this morning's Parkfield crash were a male and female in their 20s.
Two people have died after a car struck a tree on Forrest Highway close to Treasure Road in Parkfield.
Police believe a silver Holden Astra Sedan was travelling north on Forrest Highway before hitting the tree.
A witness called in the crash at about 6.30am.
The victims are yet to be identified and were found deceased at the scene.
South West Police attempted to stop the car on Peel Terrace in Busselton shortly after 3am.
Major Crash Investigators are now calling on anyone who saw the crash or the vehicle prior to the incident.
Anyone with information can call Crime Stoppers on 1800 333 000 or report to crimestopperswa.com.au.