Body of man in his 30s is found inside car submerged in Merriwa River – and it’s unclear how long wreckage had been there

A man's body has been found in a car submerged under a river in the NSW Hunter Region.

Emergency services were called to the Merriwa River, along the Golden Highway, at around 6am on Wednesday after reports a car had submerged in the water.

Police established a crime scene and officers investigated the circumstances surrounding the incident.

A man's body has been found in a car submerged under a river in the NSW Hunter Region (file photo)

After an investigation by police divers, the body of a man was found in the car.

He has yet to be formally identified, although he is believed to be in his 30s.

A report will be prepared for the coroner.