Several people were arrested after police were attacked at a party in Gisborne just before midnight on Saturday.
Two officers were called to the party on Bryce Street by a security guard who had responded to a noise complaint.
Partygoers attacked the officers, kicking one in the foot and hitting another with a bottle.
Several back-up patrols and a dog handler were called.
One of the partygoers was arrested for assaulting a police officer, and four or five others were arrested for disorder.