Auckland motorists are being urged to avoid the Ash Street area of Avondale in Auckland after a car hit a tree.
It's believed the vehicle was travelling at high speed when it crashed at about 12.40pm.
One person was taken away in an ambulance.
Police say the crash has caused a serious buildup of traffic.
Ash Street was closed between Binsted Road and Wairau Avenue and diversions put in place.
Traffic has been backed up along Rata Street, Titirangi Road and Great North Road.
- The Radio Network