UPDATE: Police aren't treating the death of a man found in the back of a car at Lambton as suspicious.
It appears the 52 year old may have suffered a drug overdose.
He was found lying in the back seat of his friend's car which was stopped by police on Griffiths Road early this morning.
The driver is unlikely to be charged over the death.
EARLIER: A man's body has been found in a car stopped at Lambton this morning.
Police pulled the car over for a random traffic stop in Griffiths Road at 3:15am, discovering the body in the back seat.
The 52 year old male driver was arrested and is currently being questioned at Waratah Police Station.
A crime scene's been set up in Griffiths Road.
At this stage police aren't saying how the victim died or if the men knew each other.
Two of the three eastbound lanes are closed, causing heavy delays for drivers.