Multiple people were involved in the scuffle before police swooped in.

As the Hurricanes were clawing their way to a win over the Blues, fists were flying in the stands at Auckland's Eden Park.

A quarrel between a Blues fan and a Hurricanes fan escalated into a wider melee about 8.45pm.

Witness Rory O'Sullivan said it began when the Blues supporter started shouting loudly toward the field.

RORY O'SULLIVAN Police arrive to quell the fight in the stands.

A Hurricanes fan standing behind him took exception to it. A "massive" fight broke out, lasting about 30 seconds.

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"All of a sudden he was involved in a struggle, and punches were flying," O'Sullivan said. "There was beer flung at them as they were scuffling.

"Loads of people around were quick to try and stop the fight. It was over pretty quickly, but it looked pretty nasty."

It took two security wardens and two police officers to break up the fight. The Blues fan was escorted from the stadium.

"The only guy who got chucked out was the Blues fan."

O'Sullivan said he could still see the Hurricanes fan enjoying the game in the stand, "sitting there, looking proud of himself".

A police spokeswoman said there hadn't been any arrests at the game.