A graduation party in the Bay of Plenty turned sour when a 17-year-old girl was left unconscious after a fight broke out this morning.
Police said they were called to the incident in Opotiki at 3.50am, after gatecrashers tried to gain entry to a private party, which was being held for Opotiki College school-leavers.
A 17-year-old girl had been knocked unconscious and was found with mouth injuries by police.
Police believed she had been unconscious for a while after she was hit by an object that was thrown.