A man who fell from a ridge on the country's tallest mountain is dead, police have confirmed.
Police said four "experienced climbers" from the Canterbury region were understood to have set out from Plateau Hut early this morning to climb Aoraki-Mount Cook's east ridge.
They raised the alarm about 7.30am after one of their team fell as they traversed the ridge.
A search and rescue operation was launched involving police, and the Aoraki Alpine Rescue Team.
That was changed to a body recovery operation this afternoon.