A man is in a serious condition after being set alight at a annual event that attracts thousands of revellers to the small, rural NSW town of Deniliquin.

Police are calling for information from the public after emergency services were called to a campsite area at the Deni Ute Muster near the Victorian border, following reports a man had caught fire at about 6.40pm on Saturday.

A 22-year-old man was found with significant facial burns after he was reportedly set on fire by another man who was trying to ignite an aerosol nearby.

The 22-year-old was treated by paramedics before being flown to The Alfred hospital in Victoria, where he remains in a serious condition.

Police have released images of a man they want to question. He is described as in his early 20s, of Caucasian appearance, about 170 centimetres tall with brown hair cut in a mullet.

He was wearing a green shirt, blue shorts with a yellow stripe, a red and black cap and no shoes.

The Deni Ute Muster has become one of the top “bucket list” events in Australia for some people. It attracts 20,000 people to celebrate rural life and the iconic “ute” on the long weekend in NSW.

Artists performing at this year’s event included Jessica Mauboy, John Williamson, Lee Kernaghen, Missy Higgins and The Whitlams.

– AAP