A lone Maori man has performed a passionate haka on the protest frontline at Standing Rock in North Dakota.
Kereama Te Ua did the powerful haka on Friday in freezing conditions surrounded by snow, with the footage uploaded to social media by fellow protester Marcus Matawhero Lloyd.
Mr Lloyd posted a moving piece of writing on Facebook along with the video.
"I defy the authority that have made my people a slave to the treaty of Waitangi," he wrote.
"I do not believe my ancestors would have signed the treaty had they known that the treaty will one day be turned against us."
Native American citizens and environmentalists at Sioux Tribe's land have recently stood up to Tasers, pepper spray and rubber bullets, protesting against the underground proposed pipeline.
The pipeline project, which is proposed to run across four US states, is expected to cost $US3.8 billion and the Sioux Tribe says it threatens local water supplies and sacred sites.
An estimated 7.4 billion barrels of undiscovered oil is believed to be in the US portion of the Bakken Formation, according to the US Geological Survey.
The Sioux Tribe has been protesting since April but things escalated within the past month when police descended on the Northern camp blockade.
Mr Te Ua's lone haka comes a few weeks after another Kiwi in North Dakota performed the Ngati Kahungunu tribal haka Tika Tonu to those on the frontline, prompting a movement across New Zealand.