Six people have been taken to hospital after a car that police were trying to stop crashed into another car at an intersection in the NSW Hunter region.
Police have launched a critical incident investigation.
A Ford Fairmont station wagon, which officers tried to stop earlier, tried to enter an intersection when it collided with a Holden Commodore sedan, police said.
Emergency services were called about 12.45pm on Monday..
A Westpac Rescue Helicopter Service spokesman said four people were trapped in the wreckage after the accident.
Ambulance NSW said paramedics were called and helped free passengers from both cars.
One person was in a critical condition, while four were serious and one had minor injuries.
The Ford was driven by a man and had three passengers – a man and two women. All four were taken to John Hunter Hospital with varying injuries.
The Holden was driven by a man and with one female passenger, who were both taken to Maitland Hospital.
A police officer was taken to Maitland for observation.
Police said the Critical Incident Team would investigate the incident, including the actions of police, and their report would be reviewed by an independent officer.
The Newcastle Herald, AAP