The death of a baby in Ōtara, South Auckland, is now being treated as a homicide.
A 28-year-old man has been arrested and has been charged with assaulting a child in relation to the death of a 5-month-old boy.
The baby died last Thursday. Sergeant Veronica McPherson, of Counties Manukau Police, said: "Police cannot rule out the possibility of further charges being laid."
The man is due to appear in the Manukau District Court today.