A teenage boy has been critically injured in a car crash in South Auckland.
The crash - which happened about midnight on Saturday - came after police arrived at a "congregation" of "car enthusiast boy-racers" in Clevedon.
Police "identified a vehicle that had sustained loss of traction", a spokeswoman said.
That vehicle then left the area, she said.
"A short time after, police followed in the direction the vehicle [left in]. However, no pursuit was initiated.