"We have established that this was not a random incident, but is unconnected to recent gang tensions in the area," Detective Inspector Chris Barry of Counties Manukau Police said.
He said four people were injured.
"Three were treated for superficial injuries and have been discharged, and one remains in Auckland Hospital in a stable condition having undergone surgery yesterday," Barry said.
The investigation was continuing today, with police interviewing witnesses and collecting and reviewing CCTV footage.