A truck has gone down a bank after a crash in Havelock, Marlborough this morning.
Emergency services were called to the incident on Queen Charlotte Drive at 10.45am.
A police spokesperson said a truck had gone down a bank and the rescue helicopter was en-route.
"The serious crash unit will be examining the scene."
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Motorists are advised to avoid the area if possible.
A Fire and Emergency NZ spokesman said three appliances are at the scene. They are assisting St John and police.
A St John spokesperson said they sent one ambulance to the scene. They directed all enquiries to police.