A video posted on Facebook on Wednesday night showed two groups clashing in the suburb of Otara.

A young fan burning a Samoan flag has sparked a rampage by a stick-wielding mob of 200 in south Auckland.

A machete was confiscated and six people arrested after the Rugby League World Cup fan disorder, triggered when a crowd gathered in the carpark next to a reserve, in Pearl Baker Dr, Otara.

Tensions had increased in recent days between Tongan and Samoan fans as their nations got set to meet in Hamilton on Saturday for a crucial world cup league match.

RNZ Six people were arrested last night following a brawl involving 200 Tongans and Samoans in a carpark in Otara.

Road closures in the area were made to ensure people's safety, a police spokeswoman said.

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Māngere MP and Minister for Pacific Peoples Aupito Su'a William Sio told RNZ a young fan burning a Samoan flag sparked the week's violence.

"I suspect it was triggered when a video was shared on social media.

"It think it was just a silly prank, that young man and his family have since apologised."

A WEEK OF HOT HEADED CONFRONTATION

Another video posted on Facebook on Wednesday night showed two groups clashing.

Young people shoved and shouted at each other, and broken glass is seen scattered over the ground.

A witness said one person was struck by a bottle during the fracas, but that others intervened to prevent the violence from escalating.

The incident was a small part of the film, most of which showed Tongan supporters driving around cheering and laughing.

Tongan community members who commented on the most recent video urged their fellow fans to stay calm and avoid ruining the celebrations for everyone else.

"This is disgusting, ruining it for every other tokouso out there that are wise enough to keep the peace," wrote Jayne LeiLa Finau.

"Nice to see you boys supporting," said Feliuai Fuimaono. "PLEASE no need to fight."

AnnRosey EvaNjta FitaOra urged those causing trouble to "please just go home and sleep".

Following the four arrested on Tuesday night, Counties Manukau west area commander inspector Naila Hassan urged fans to act responsibly.

"Overall supporters have been well-behaved, however the actions of a small number of people have been disappointing," she said.

Hassan added police were also concerned about reckless driving.

The Tongan team posted its own video on Facebook urging fans to keep the peace.

Player Tui Lolohea reminded supporters it was just "a game of footy".

"At the end of the day, it's just a sport between two nations who are pretty passionate about their sport," he said.

"It's pretty embarrassing to see that kind of stuff."

League rivals Tonga and Samoa meet for their World Cup clash in Hamilton on Saturday.

* This story has been updated to correct the location of the gathering of 200 people. Police originally stated it was at the Otara Mall. They were wrong.