A police officer was allegedly bitten, another allegedly struck with a star picket, and officers forced to retreat after a crowd allegedly threw rocks, window louvres and metal bars during unrest in Wadeye on Friday evening, with NT Police saying alcohol contributed to the violence.

Senior Sergeant Byron May said police went to a home in the community about 6.10pm to arrest a 17-year-old boy allegedly involved in assaulting a worker, going armed in public, and unlawfully damaging property.

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