One is five years old, the other is seven. At an age where most milestones are measured in classrooms, Abyaz Adrito Bhuyan and Anabia Audree Hossain were measuring theirs in Himalayan altitudes.

At least 11 people -- eight foreign tourists and three Nepali high altitude workers -- have gone out of contact in the Annapurna Base Camp and Manang area since Friday. The areas have been witnessing heavy snowfall for the past few days.