Northern Territory Police are calling for witnesses in relation to an unlawful entry at a school in Gillen overnight.

At 11.45pm, police received a report that a school along Adamson Avenue, Gillen had been unlawfully entered.

The unknown offenders have caused an extensive amount of damage inside the reception area.

Strike Force Viper is urging anyone with information or who may have witnessed the incident to make contact on 131 444. Please quote reference 10520718.

Anonymous reports can also be made through Crime Stoppers on 1800 333 000.