Two teens have been found guilty of murder - over the road-rage stabbing of a stranger in Auckland's Beach Haven, last year

Joshuah Tasi had a minor crash with the 19 year old and 15 year old's vehicle - after they blocked an intersection.

The pair got out and approached 28-year-old Tasi's car from both sides - then the older boy stabbed him multiple times.

A witness says the pair, who will keep name suppression, then jumped up and down, yelling taunts at the victim.

They'll be sentenced in July.