The moment a man was fatally speared during a massive brawl in a remote Aboriginal community was filmed, and police believe the footage will likely assist in identifying the killers.

The video of the deadly spearing and the fight which left two men dead and another injured in the tiny community of Angurugu on Groote Eylandt, off the coast of the Northern Territory, has been handed to police.

Tensions were still running high in the community following the deaths on Friday of the men aged 19 and 29, during the fight that was so large police had to retreat from the scene.

Northern Territory Police Commander Tony Fuller said his officers had since obtained video footage that "appears to capture images of those involved in the death of the two males killed during the dispute".

Commander Fuller said the video showed a male struck by a spear, which had been thrown by a member of one of the opposing groups.

Police say that man was then speared by others involved in the brawl.

The dispute is believed to have erupted after two women had an altercation at Angurugu on Thursday.

A relative intervened and as a result a woman had to be taken to the local clinic after being knocked unconscious. She was later released without any serious injuries, Commander Fuller said.

He said on Friday a male relative from the Umbakumba community had driven to Angurugu to find out what occurred. On arrival three men threw rocks at his car causing him to crash into a fence, and prompting him to leave the vehicle with some weapons and search for the three men who fled.

Police were called but the driver did not want to make a complaint.

Shortly afterwards the three men returned with weapons and started arguing with the male driver.

Commander Fuller said: "Additional police were called in but a large crowd gathered carrying weapons including spears. Police attempted to disperse the crowd but were forced to retreat due to the overwhelming numbers of armed persons who had gathered at each end of the street brandishing spears at each other.

"One group has thrown a spear which has in turn led to an exchange of spears between the two groups.

"Police observed one of the males being struck and rendered first aid immediately, evacuating him to the local clinic where he passed away.

"Police also located two more injured persons and evacuated them directly to the clinic. Unfortunately one of the males subsequently passed away as well," Commander Fuller said.

Detectives, tactical response group police and members of the police dog squad were flown in from Darwin to calm the scene and investigate, according to police. Another seven officers were flown in over the weekend to assist.

Commander Fuller said the community was in "deep shock and mourning".

Earlier he had appealed for anyone who filmed the incident on mobile phones to hand the vision in to police.

"We understand that the community is grieving and in shock. However police are asking the elders and the community to assist in having these offenders come forward so that police can bring them to justice," he said.

Commander Fuller said police understand that many in the community may be fearful of revenge.

"We ask the offenders to make contact with local police so that we can make arrangements to protect them."

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