A crash on Auckland's Southern Motorway left one car overturned, after another vehicle reportedly crossed two lanes.
Police say the vehicle is believed to have crossed two lanes of the north-bound motorway near Ōtāhuhu at about 5.42am and caused two other cars to collide, one of which flipped over.
The vehicle left the scene and police are trying to find the driver.
No one was seriously injured.
Three lanes are open but there are delays for motorists.