Emergency services are responding to a single vehicle crash on Lake Rd.
Police were notified of a car hitting a tree about 6.45am.
One person is reported to have serious injuries.
Traffic management is being put in place, which will affect traffic heading north on Lake Rd from Dinsdale Rd.
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Motorists are advised to delay travel or avoid the area if possible.
A reporter at the scene said the car had hit a tree on a median strip near what is known as Koutu corner and westbound traffic is down to one lane.
He said police were at the scene managing traffic.