One person is dead and another critically injured after a stabbing in the Auckland suburb of Mt Albert.
A person at the scene said a body was lying in the middle of Renton Road, at the end of the cul-de-sac, and the injured person had already been taken to hospital by ambulance.
St John said they were called at 12.15am.
A witness told the Herald he had seen at least three young people - both male and female - being taken away in a police vehicle. They all appeared to have been intoxicated.
"There's a lot of police here - about 15 police cars" he said.
"There was a person lying in the road, with paramedics working on him."
The witness said he believed the fight was a "family thing", and that the victim's throat had been cut.
"It was on a real quiet, dark cul-de-sac," he said.
Detectives could be seen walking up and down the street also and police were telling anyone who walked out of their homes to get back inside.
Police have blocked off the whole street and a dog unit is also on site.
Three of the houses at the end of the cul-de-sac are owned by Housing New Zealand, while the remainder are privately owned.
Items are scattered across the road behind a police cordon, and two tents are erected on the street outside the house.
A gold car with its passenger door open is parked diagonally across the berm outside the home.
Police said the person taken to Auckland Hospital by ambulance in a critical condition was an "associate" of the man killed.
He underwent emergency surgery and is in a stable condition.
Police were called to the incident by people associated with the address.
"Investigating officers, alongside ESR scientists, are this morning focused on getting under way with a detailed scene examination, speaking to witnesses and canvassing local residents for any information that might assist locating those involved in the fatal incident," a police statement said.