The Mongolian nationals went missing on Sunday after climbing the 4,021-metre (13,192 foot) Mount Otgontenger, the National Emergency Management Agency said.
The group was made up of four women and 13 men aged 30 to 50, and there were no survivors.
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Otgontenger is a popular destination for climbing tourism, boasting the country's most extensive granite wall.
Just four other climbers have died since the 1960s, but the environment ministry in 2015 banned climbing for safety reasons.
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