Police have been told the man was travelling in a Mitsubishi Triton utility on Netley Road, about 90km south-west of Broken Hill, when the vehicle was swept off the road by a flooded creek about 5am on Sunday morning.

The 64-year-old driver and his passenger, a 37-year-old man, got out of the vehicle, however during their attempts to swim to safety, the driver lost consciousness.

He was pulled to dry land by the passenger, however he died at the scene.

Officers from Barrier Police District were notified and attended the location, where the man's body was recovered.

An investigation is underway into the circumstances surrounding the incident and a report will be prepared for the Coroner.

Anyone with information about this incident is urged to contact Crime Stoppers: 1800 333 000 or https://nsw.crimestoppers.com.au.

Information is treated in strict confidence.

The public is reminded not to report crime via NSW Police social media pages.