"Alberto Zerain, a Spanish alpinist, and Mariano Galvan, an Argentinian national, went missing while trying to climb Nanga Parbat," the world's ninth highest mountain, Alpine Club of Pakistan spokesman Karrar Haidri told AFP.
Muhammad Iqbal, owner of Summit Karakorum, the tour operating company that had arranged the climb, said the duo had left base camp on June 19 but were holed up in their tent for three days at an altitude of 6,100 metres (20,000 feet) due to bad weather.
"Our sherpas on the mountain estimate them to be somewhere above 7,000 metres which makes it impossible for them to climb and search so we have requested a search and rescue helicopter, which will start either today or tomorrow depending on weather conditions," he added.
At 8,125 metres, Nanga Parbat earned its grisly nickname after more than 30 climbers died trying to conquer it before the first successful summit in 1953.
Also Read
In 2013 gunmen shot dead 10 foreign climbers and their Pakistani guide at the Nanga Parbat base camp - one American with dual Chinese citizenship, two other Chinese, three Ukrainians, two Slovakians, one Lithuanian and one Nepalese.
Nestled between the western end of the Himalayas, the Hindu Kush mountains and the Karakoram range, the Gilgit- Baltistan region houses 18 of the world's 50 highest peaks.
It is also home to three of the world's seven longest glaciers outside the polar regions. Hundreds of its mountains have never been climbed.
Disclaimer: No Business Standard Journalist was involved in creation of this content