A woman has died at a house in the South Auckland suburb of Manurewa after being assaulted.
Police arrived at the Smedley Street property at 3.20am, after being alerted to the fact that a woman had been assaulted.
The woman died at the scene.
A man was arrested a short time later, and the police are not seeking anyone else in relation to the incident.
Police say they are investigating the incident as an unexplained death.