Two people have been arrested after an out-of-control party in Rotorua that took police, wearing protective riot gear, about an hour to clear.
About 100 people between the ages of 15 and 20 were at the gathering in the suburb of Western Heights.
Some threw rocks and bottles at officers.
In Tauranga, eleven arrests were made overnight in the central business district, most over charges of breaching the liquor ban and disorder.
