A "Good Samaritan" who died after reportedly trying to stop a fight died from a medical condition, say police.
Ken Poihipi, 62, who lived in Auckland's Clendon Park, died after a fight on the corner of Elliot St and Great South Rd in Papakura about 2.40am.
He was taken to Middlemore Hospital in a critical condition but later died.
It is understood he was trying to prevent a younger man from being beaten up.
Police said yesterday that they had opened a homicide investigation into the incident.