Stolen BMW crashes into driver: police

Police in Perth are investigating a pursuit that ended with a 51-year-old man in a critical condition after his car was hit by a stolen BMW driven by a teenager.

Police say officers tried to stop the BMW on Albany Highway in East Victoria Park on Saturday night, but the 16-year-old driver sped off.

A brief chase by officers on the ground was taken over by the Police Air Wing, which continued to pursue the car.

Police said the BMW ran a red light at the intersection of McDowell Street and Orrong Road in Welshpool and struck another vehicle.

They said the young BMW driver ran off after the crash but Air Wing officers spotted him hiding in bushes and he was arrested a short time later.

He remains in custody and was later charged with aggravated dangerous driving causing bodily harm, no authority to drive, stealing a motor vehicle, reckless driving and failing to stop when directed by police.

He is due to appear in the Perth Childrens Court on Monday.

The 51-year-old man is in Royal Perth Hospital in a critical but stable condition.

Investigators from WA's major crash unit have been called in to investigate the crash, which will also be probed by the WA police internal affairs unit.