There has been a serious crash on State Highway 25 near Manaia this morning.
The crash, involving a motorcycle and a car, was reported shortly after 6am.
Initial reports were that one person was seriously injured.
A police media spokesman said police were notified by St John.
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The road was blocked in both directions and diversions were in place.
A Fire and Emergency NZ spokesman said the Fire Service was in attendance and were assisting police and St John. They were also helping with traffic management.
St John said one patient was in a critical condition and was being transported to Auckland Hospital in a helicopter.