Update, Wednesday, August 29: The car driven by a teenager who was seriously injured when crashed into another vehicle on Bangalow Road near Bexhill yesterday may have been stolen, police say.
They add that the Subaru the boy was driving was spotted by police just minutes before the crash took place.
A critical incident investigation has now been launched.
About 12.20pm (Tuesday August 28), emergency services were called to Bangalow Road at Bexhill, about 10km north of Lismore, following reports of a two-car crash.
A marked police car sighted the Subaru station wagon travelling west shortly before it collided with a Volkswagen Golf sedan.
The driver of the station wagon, a 17-year-old boy, was taken to Gold Coast University Hospital where he remains in a serious but stable condition.
The driver of the sedan, a 73-year-old man, was taken to Lismore Base Hospital with minor injuries and has since been released.
A critical incident team from Tweed/Byron Police District will investigate the circumstances surrounding the incident.
The investigation will be subject to an independent review.
No further information is available at this time.
Update 3pm: A 17-year-old boy has been airlifted to hospital in a critical condition following a two-car collision on Bangalow Road, Richmond Hill, near the intersection of Boatharbour Road, earlier today.
An Ambulance NSW spokesperson said the service was called out just before 12.30pm, with four units and the Westpac Rescue Helicopter attending.
The 17-year-old male driver of one of the vechicles has since been airlifted to Gold Coast University Hospital in a critical condition with head injuries.
He has been intubated & sedated.
The 60-year-old male driver of the other vehicle was conscious and breathing. Local media said he did not require hospitalisation.
Police remain on the scene
Original report: Two cars have collided in a serious accident on Bangalow Road, near Boatharbour Road at Richmond Hill.
The accident took place just before 1pm and emergency services, including the Westpac Life Saver Rescue Helicopter, are now in attendance.
There are believed to have been two occupants in each car, with at least one in a serious condition.
The Transport Management Centre advises that one lane of the road is completely closed and stop/slow traffic conditions are in place.