Many of the missing are foreign tourists; US Geological Survey believes the disaster was caused by a glacial collapse.

Across the border, Tibet reported "major casualties" with people missing in the neighbouring county of Gyirong.

Nepal's tourism board says Americans, Indians, an Australian, Malaysians and Britons among those missing.

Villages and roads swept away as officials warn of 'major casualties'

Rescue crews scramble after Nepal-Tibet floods kills at least 160 | World News