The light from an MP3 player saved two lost tourists from a chilly night stuck out in the snowy Swiss mountains, rescue authorities said Saturday.

The two -- a skier and snowboarder, both from France -- had got lost late in the day Friday outside marked runs near the resort of Savognin in southeast Switzerland, said Gery Baumann, spokesman for mountain rescue service Rega.

They were able to alert authorities using a mobile phone, but it then ran out of battery power, Baumann said.

"The two winter sports enthusiasts were found by the crew of the Rega helicopter shortly after midnight -- thanks to the faint light of their MP3 player," he said.

The two men had only mild hypothermia.