Northern Territory Police are calling for witnesses in relation to alleged arson in Fannie Bay.

A report of a structure fire at a residential address was received around 9:15pm yesterday. Members of the public entered the property and extinguished the fire.

Police attended and a crime scene was established. A 44-year-old male has been arrested in relation to the incident.

Police would like to thank the members of the public who assisted in extinguishing the fire.

The Serious Crime Squad are investigating.

Anyone with information is urged to contact police on 131444 or Crime Stoppers on 1800 333 000.