A homicide investigation has been launched following the fatal stabbing in the Northland town of Moerewa last night.
Emergency services were called to an address at 8.45pm.
Police say a 57-year-old man died at the scene.
A woman is currently assisting Police with inquiries.
Police say the pair are known to each other and no one else is being sought over the incident.
A post mortem examination will be carried out tomorrow.
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