A 16-year-old was on electronic bail when he and his co-offenders allegedly launched an attack on two Hamilton police officers.
Hamilton city area commander Inspector John Kelly said two officers - one male, one female - went to check on the teen just before 9pm yesterday after he was bailed to a Kahikatea Dr house.
The teen wasn't there however he was found shortly afterwards drinking at a Karen Cres, Dinsdale, property with a number of other people.
Mr Kelly said the people at the scene were initially co-operative before things turned aggressive.
"As our officers were trying to effect an arrest the juvenile has resisted, punching an officer about his head and face.