Nepal's Ministry of Culture, Tourism, and Civil Aviation has initiated an investigation into the use of Xenon gas by climbers during their recent ascent of Mount Everest.

Use of Xenon gas, believed to help prevent altitude sickness, reduce low-oxygen effects, stirs debate in mountaineering community - Anadolu Ajansı

Four British climbers became the first to scale Mount Everest on Wednesday using Xenon gas, which helped them save several weeks that mountaineers need to get used to high altitudes, an official of their expedition organising company said.