A man and a woman head to court today after a man was allegedly set alight in Coonabarabran yesterday (13 October).

Police say a 19-year-old man was walking on Cowper Street at about 6pm on Monday when a man and two women approached him.

"Police have been told a member of the group allegedly poured a liquid onto the man before he caught alight," a police spokesperson said.

"Passers-by extinguished the fire and the man before he was taken to hospital for treatment.

"A short time later, police were called to the same street after reports of a public order incident.

"Officers attached to Orana Mid-Western Police District responded with the assistance of detectives."

It isn't yet clear what motivated the incident. [IMAGE: River McCrossen]

The spokesperson said a crime scene was established.

They also said a 45-year-old woman, a 19-year-old man and a 17-year-old girl were arrested at a nearby property.

They were taken to Coonabarabran Police Station, where the man was charged with causing grievous bodily harm and affray, while the older woman was also charged with affray.

They were refused bail to appear before Bail Division Court 4 today.

The teenage girl was released pending further investigation.

Police are urging anyone with information on the incident is to contact Crime Stoppers on 1800 333 000.