A 15-year-old boy has been referred to Youth Aid following a brawl at a high school rugby match in Otahuhu last month.
Counties Manukau West Area Commander Inspector Jason Hewett said police believe the 15-year-old boy was responsible for throwing a punch that left another 15-year-old boy unconscious.
Mr Hewett said the investigation was lengthy and involved interviewing a large number of people, including adults, who needed to take responsibility for their actions.
"This was a high school rugby match, that sort of behaviour is absolutely unacceptable and will not be tolerated in the community.
"Everyone who attends sport events like this needs to be safe and feel safe while attending."
Mr Hewett said anyone who sees inappropriate or threatening behaviour at a sports match should alert team officials.
"Parents and caregivers should lead by example, by being enthusiastic but remembering this is a game, and everyone is there, including the referees and coaches for the growth, development and enjoyment of the children and teenagers," Mr Hewett said.
Meanwhile, the Auckland Rugby Union's independent judicial committee met last week to review the abandoned match between Otahuhu College and Tangaroa College under-15s.
The panel ruled that the referee was justified in calling the match off and that neither teams would receive competition points.
A fine was imposed on both teams, which is refundable if specific conditions are met.
Auckland Rugby Union chief executive Andy Dalton thanked the police for their support in dealing with the matter.
"It was an unsavoury incident that took place and one we hope not to see again," Mr Dalton said.
