Enquiries are continuing into the circumstances of the disorder incident in Mt Albert on Friday night.
Detective Senior Sergeant Anthony Darvill says the behaviour of some in attendance that night is clearly unacceptable.
"This behaviour won't be tolerated in our community, and investigators are working diligently to identify those responsible and hold them to account for their actions."
He says while Police understand the community frustration and concern, the incident as a whole does appear isolated.
"I want to reassure people that we are working as hard as we can to get to the bottom of what happened," he says.
Police and partner agencies are supporting those that were injured in the incident. At least one of the young people seriously injured in Friday night's events remains in hospital following surgery.
Detective Senior Sergeant Darvill is asking anyone who has information that could help Police, such as cellphone footage, who has not yet spoken to officers to come forward.
