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.
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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