Police are appealing for witnesses to a stabbing near a South Auckland Christian Camp on Tuesday night.
About 9.30pm, a man driving a blue Toyota Camry was attacked by another male motorist at the intersection of Turner, Dunn and Ararimu Rds in Ararimu, east of Ramarama.
The victim was taken to Middlemore Hospital with serious injuries.
Police would like to speak to the driver of the other vehicle.
Anyone with information on the attack should contact detective Liana Watson, from Counties Manukau police on 09 261 1321.
Alternatively, information can also be provided anonymously to Crimestoppers on 0800 555 111.