https://phys.org/news/2018-05-crypto-currency-stunt-everest-linked.html

"We are now aware that one of the Sherpas who assisted our group amongst others, went missing during the descent," the company said in a statement.

Lama Babu Sherpa has not been seen since 14 May and is presumed dead, Nepal-based Seven Summit Treks, who organised the logistics for the expedition, told AFP.