The avalanche on the Tsa mountain, above the village of Arolla in the southern Swiss canton of Wallis, swept away the skiers shortly after 2:00 pm (1300 GMT) on Saturday, cantonal police said.
The four skiers, all Swiss nationals, had left the Tsa mountain refuge in two separate groups and had been moving through a narrow passage when the avalanche hit.
Rescue workers arrived by helicopter and were able to dig out the buried skiers, who were flown to hospital.
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