Grace Millane - one of six suspected homicides in NZ in 11 days

Grace Millane is one of six people killed in New Zealand in the last 11 days.

Among them was a woman attacked at her home in South Auckland, allegedly by a man she knew.

He's now been charged with murder.

Forensics were at the scene today, where locals say a child's screams rang out across the quiet suburban neighbourhood on Monday night.

"The small boy was screaming mum, mum, mum," one resident told Newshub.

Police say they were called to a house in Flatbush in the city's southeast about 10pm on Monday night after they were alerted to a woman being attacked.

It's around this time that this neighbour, who didn't want to go on camera, says the woman's child started screaming.

"I came out and the whole street was full of ambulances and police around and they put a crime scene outside," he said.

The woman had several injuries and was taken to hospital where she died.

Police say that while they were at the property, a man called, claiming he was the alleged attacker.

They say the man was located in the nearby suburb of Botany.

It is understood a 33-year-old man, who is known to the woman, has been charged with her murder and investigators aren't looking for anyone else.

It comes as police investigate five other deaths.

A large forensics team has been at a Sandringham home today following an "unexplained death" overnight.

A man has been charged with grievous bodily harm after a young father with life-threatening injuries was dropped off at hospital in Christchurch on Saturday night and died.

A day earlier 21-year-old Rima Fernando Sikei died from stabbed wounds in Mount Roskill. A 32-year-old has been charged with his murder.

And on the same weekend police allege Grace Millane was killed, 71-year-old Francis Tyson was decapitated in Petone.

Since 2015, the homicide rate has dropped from 64 to 58 to 48 last year, but this year we're up.

Provisional figures show we're at 59 to date, and six possible homicides in two weeks is a lot - and behind every statistic is a story.

"She was a very kind lady and when we moved in she came in and asked if she need anything let her know," the South Auckland man said.

"She told us she's a single mum and she's got a cute boy."