The 15-year-old was killed alongside a man and woman whose identities have not yet been confirmed, police said.

A 20-year-old Swiss man was flown to hospital with serious injuries after the avalanche at 2pm local time (1pm UK time) on Monday.

It took place in an off-piste area of the Riffelberg slopes, which sit above the Zermatt resort and below the famed Matterhorn mountain.

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Prosecutors have been investigating the incident.

Last month, five members of a Swiss family were found dead after going missing while cross-country skiing near the Matterhorn in difficult weather conditions.

Authorities abandoned the search for a sixth missing person days later.