Emergency services have rushed to a crash between a milk tanker and a car in Dunsandel, Canterbury.
The crash at the intersection of Main South Rd (State Highway 1) and Parkins Rd was reported to police at 12.23pm.
A St John spokeswoman said one person had been taken by helicopter to Christchurch Hospital in a serious condition.
Fire and Emergency New Zealand sent crews from Rakaia and Dunsandel to the crash.
The road is closed and traffic is being diverted.
