Two fighting for life, critical incident declared after police vehicle and sedan collide before crashing into Sydney homes

Two people are in hospital in critical condition following a collision involving a police vehicle and a sedan on Sunday.

Police were called to Prairie Vale Rd in Bossley Park — about 45 minutes west of Sydney’s CBD — about 12.20pm following reports of a crash.

Officers were responding under lights and sirens to an incident involving a child seen running on the road, police say, when their vehicle collided with a red Kia sedan.

Both vehicles came off the road, crashed through a fence and hit separate houses.

The Kia driver, a woman believed to be aged in her late 20s, was treated at the scene before being taken to Westmead Hospital in a critical condition, while her passenger — believed to be aged in her early 50s — was taken to Liverpool Hospital where she is also critical.

Two male police officers were taken to Liverpool Hospital for minor injuries and mandatory testing. No one inside the houses was injured.

The 7NEWS chopper spotted the red sedan displaying P-plates which appeared to have smashed through a fence and into a brick home with a “JUST SOLD” sign out the front.