A 16-year-old boy has been killed after a high-speed police pursuit ended with a car slamming into a tree and splitting in two at Hovea, 30 kilometres east of Perth.
Police said a car carrying three people failed to stop for officers before the driver lost control and crashed into the tree at high speed on Great Eastern Highway just before 6:00pm on Thursday.
The teenage driver died at the scene.
The passengers, a 16-year-old boy and an 18-year-old woman, suffered serious injuries.
The woman was airlifted to Royal Perth Hospital by the rescue helicopter while the boy was taken to the same hospital under priority by ambulance.
Police said it took several hours to free the trapped 16-year-old passenger from the wreckage, and he is being treated for serious leg and spinal injuries.
They said the trio's red Nissan Pulsar sedan was being driven dangerously when it was spotted by an unmarked police car in the eastern Perth suburb of Lockridge.
Officers said the driver did not stop and continued towards the Roe Highway.
It sideswiped another car at a nearby intersection, causing minor damage, and was then seen by another unmarked police car about 15 minutes later on the highway.
When it again refused to stop for police, a stinger tyre-bursting device was deployed on Great Eastern Highway, which the driver managed to evade.
The car crashed into a tree some minutes later.
Police said a report would be prepared for the coroner.
Major Crash officers will investigate the incident, overseen by the police Internal Affairs unit.