Five people were taken to hospital after a car crashed into a karaoke bar in Papatoetoe in south Auckland.
One man had serious head injuries, and several arrests have been made.
The police say a Holden Commodore hit the bar on the corner of Great South Road and East Tamaki Road at about 3am on Saturday.
Senior Sergeant Duncan Hall was at the scene and said up to six people may have been travelling in the vehicle.
He said it appears that a fight broke out after the crash between the occupants in the car and bar patrons.
"There were a number of injured people from the vehicle and there was also a pedestrian that had been struck by the vehicle and pinned against the wall of the bar. There was one person seriously injured and he was from the car. At this stage we don't know if that was as a result of the car accident or the subsequent fight."
Senior Sergeant Duncan Hall said speed and alcohol were likely to have been factors and the Serious Crash Unit was investigating.
At the time of the crash, emergency services were taking a call from a member of the public who was concerned at the speed the car was travelling.
A set of traffic lights were reported to have been knocked over during the incident, exposing live wires.
Investigations are continuing.