"We also ask that the young people that were present in the area over that time frame, (10pm 28 July until 1am 29 July) to contact police, with their parents or guardians, as soon as possible on 07 858 6200 and refer to Operation Argus," a police statement said.
"Our condolences and thoughts go out to Mr Kingi's friends and his family at this tragic time," it said.
A 15 and 13-year old were arrested and charged with aggravated wounding and unlawful interference with a motor vehicle and appeared in Hamilton Youth Court on Saturday. A 12-year-old will also be referred to Youth Aid for unlawful interference with a motor vehicle.