Fire crews are working to extract a person from a four-wheel drive after it crashed with a truck.
A Fire and Emergency NZ spokesperson said they were called to Opouri Rd, Rai Valley, in Marlborough, about 11am.
Crews are working to cut the trapped person free and a St John helicopter has been called to the scene.
A St John spokesperson said they transported one patient in a serious condition to Nelson hospital via helicopter.
