Emergency services are attending a serious crash on the Napier Hastings Expressway, SH 2B, at Tamatea.
Police received reports around 1:35pm that a car had hit a tree on the Expressway in the Rochester Street / Edmundson Street area.
One person has sustained serious injuries.
The Serious Crash Unit has been notified.
Diversions are in place and motorists are advised to expect delays.