A man is in a critical condition following a crash at Raymond Terrace overnight.

It was about midnight that emergency services were called to Parkway Avenue, where a white Toyota Camry had crashed into a pole.

There were four people in the car: a 25-year-old man, the driver; a 53-year-old man in the front passenger seat; and in the back seat, a 14-year-old boy and 24-year-old woman.

All sustained injuries in the crash; they are receiving treatment at John Hunter Hospital.

The most seriously injured is the 53-year-old man. He is reported to be in a critical condition.

While in hospital, the driver will undergo mandatory blood and urine testing.

Specialist police from the Crash Investigation Unit are examining the circumstances surrounding the crash.