One person was critically injured and another suffered serious injuries in a crash near Hanmer Springs this morning.
Police and St John Ambulance crews attended the scene at the Percival Bridge on Hanmer Springs Rd shortly after 4am.
Two people were rushed to Christchurch Hospital via helicopter.
The road was now closed, with diversions in place at River Rd and Jollies Pass Rd.
The serious crash unit was investigating.