A person is in critical condition and Hibiscus Coast Highway is closed near Waiwera after a car left the road and crashed into a tree this morning.
Emergency services were called to the crash near the Waiwera Rd intersection about 9.30am.
St John tweeted that they took one person to Auckland City Hospital in a critical condition.
The road was closed between Otanerua and Waiwera roads but has since reopened.
Delays are expected and motorists have been asked to avoid the area as the crash is cleared.