ISLAMABAD – Two climbers missing on a treacherous peak in northern Pakistan known as “Killer Mountain” are now presumed dead and the rescue operation has been called off, officials said Saturday.

The two climbers, Alberto Zerain, a Spanish alpinist, and Mariano Galvan, an Argentinian national, went missing while attempting to summit the 8,125 meter peak, Nanga Parbat.

“The search and rescue operation for the two missing alpinists has been called off as a rescue team failed to locate them this morning,” Muhammad Iqbal, owner of Summit Karakorum, the tour operating company that had arranged the climb stated.

“A rescue helicopter hovered around the mountain this morning and the team failed to spot any signs of life,” he said.

Karrar Haidri, spokesman of the Alpine Club of Pakistan, confirmed that the search and rescue operation had been called off and that the alpinists were presumed dead.

A total of 14 foreign climbers were attempting to summit Nanga Parbat this year when bad weather forced them to return to base camp last week, reported Geo News.