The passenger of the car died on impact; while the driver managed to free himself from the wreckage.

He was taken to Liverpool Hospital with head injuries and is in a serious condition.

Witnesses have told police that they saw four men get out of the taxi and run away across a nearby park.

Police believe the taxi had been stolen.

Anyone with further information is being asked to contact the Metropolitan Crash Investigation Unit at Parramatta, or Crime Stoppers on 1800 333 000.