Despite attempts to revive him, he died at the scene, police said in a statement. A number of young people had been at the address before he was killed.
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In the past week, there have been five homicides in New Zealand.
They come on top of a month of mayhem in which a string of deadly attacks contrasted starkly with the relative calm of the Covid-19 lockdown.
The country had seen relatively few fatal, violent incidents during lockdown, which finished on April 27.
But since May 1 the Herald has counted 12 alleged murders - a deadly lurch forward after the country recorded its lowest homicide rate for 40 years in 2018.
That year, seven people were killed for every million in our country, for a total of 35 deaths. Last year's figures were skewed by the tragedy of March 15.
Violent deaths since May 1
May 1
Auckland: Solo mum Tania Hadley dies after being stabbed, covered in petrol and set on fire. A man has been charged with murder.
May 11
Tokoroa: A woman aged 28 is charged with murder after a man is found dead at a house on Moa Place.
May 13
Auckland: The body of Angela Smith is found in her Henderson flat. Two men, 51 and 58, are charged with murder two weeks later.
May 16
Te Anau: Police are called to a motel where they find the body of Shirley Reedy. A man, 52, is charged with murder a short time later.
May 17
Otaki: Police charge a 33-year-old with murder after a man in his 50s dies after being injured at Mill Rd.
May 20
Rotorua: Police charge a man, 59, with murder after the death of a man in Owhata.
May 26
Auckland: Police launch a homicide inquiry after the death of a girl, aged 1, in Clover Park.
June 1
Auckland: The body of Mongrel Mob member Clifford Umuhuri is found near Auckland City Hospital after a shooting in St Johns.
June 1
East Cape: Police arrest a man, 56, after the death of a man in his 50s at Waihau Bay, north of Opotiki.
June 4
Auckland: One man killed and another injured. A 37-year-old man has appeared in court charged with murder and grievous bodily harm.
June 5
Hamilton: A person is killed at 8 Slim St in Hamilton. Police are seeking the public's help finding the killer and have asked for anyone seeing people or vehicles leaving the house between 5.30pm and 5.45pm to make contact.
June 7
Moerewa: Man fatally stabbed. Police and ambulance called about 12.20am and found an 18-year-old unresponsive. Despite attempts to revive him, he died at the Snowden Ave scene.