Two men have been charged with murder and another as an accessory following the death of a man in Raumanga, Whangārei.
Shayden Perkinson, 25, was the victim of what police said was a serious assault last weekend, dying of his injuries.
On Thursday, Detective Inspector Dene Begbie said police arrested four men in South Auckland that afternoon.
"Two of the men, aged 24 and 29, are charged with murder," he said.
"Investigation staff have been working hard to piece together the events of the night, so it is pleasing that arrests have now been made."
A 25-year-old man was charged with accessory after the fact to murder and unlawful possession of a pistol. The fourth, aged 54, was charged jointly with the 25-year-old for unlawful possession of a pistol.
Police said Perkinson's death touched many.
"Our thoughts are with his whānau who are still coming to terms with the devastating events of Saturday night," Begbie said.
"I would also like to acknowledge those in the community who have assisted in our investigation so far."
Police said they might have more arrests to make.
The four men already charged will appear in Manukau District Court on Friday.