A man believed to be an 18-year-old from the ACT has died following a single-vehicle crash near Yass today.

About 9.10am on Sunday 29 January, emergency services were called to Yass Valley Way, Yass, following reports a member of the public had discovered a vehicle lying in a gulley beside the road.

NSW Police officers attached to The Hume Police District attended and located a deceased man who is yet to be formally identified; however, he is believed to be an 18-year-old from the ACT.

A crime scene has been established which will be examined by specialist police.

A report will be prepared for the information of the Coroner.

As inquiries continue, anyone with information into the incident or dashcam footage is urged to contact police or Crime Stoppers on 1800 333 000 or nsw.crimestoppers.com.au.

NSW Police stated that information is treated in strict confidence and reminded the public not to report information via NSW Police social media pages.