A man has died after he was restrained by police following an assault on a staff member at Whangarei Hospital.
The man was a patient in the mental health unit, and had been restrained by both police and hospital staff after assaulting the member of staff.
Police said they were already at the hospital to deal with an unrelated incident.
The man became unresponsive after the incident and CPR was carried out but the man died shortly after midnight.
Acting Detective Inspector Lloyd Schmid from Northland CIB said police were investigating.