Four injured after Sydney police chase ends in crash

A police chase in western Sydney has ended in a crash, leaving four people injured.

Police said officers began following a car shortly before it collided with another one in Blacktown late last night.

The driver of the car being pursued fled the scene, while three female passengers were taken to hospital, one with serious injuries.

The driver of the second car was taken to hospital with minor injuries.

An investigation being overseen by the Professional Standards Command is underway.