A glacier collapse in Tibet triggered catastrophic flash floods along the China-Nepal border, leaving at least 273 people dead and more than 1,300 missing across the two countries as of Thursday. The disaster has affected local residents, security personnel and hundreds of foreign nationals who were in the region for trekking, travel or pilgrimage to sacred sites. In Nepal, police reported at least 270 deaths and 826 people missing. Local reports, citing the National Emergency Operation Center, said those unaccounted for included 113 Nepali tourists, 85 army and police personnel, 161 residents of Rasuwa district and one person from neighbouring Nuwakot district. The National Tourism Board later reported that 517 foreigners were missing.

The scale of the disaster has made it difficult to establish a single confirmed figure for those missing. Authorities and agencies have been collecting information at different times and through different channels, while rescue operations in remote and badly affected areas have also faced coordination and communication challenges. Officials have warned that the numbers could change as verification and search operations continue. India accounts for the largest reported group of missing foreign nationals in Nepal. The country's tourism board said 179 Indians were among those reported missing. Officials said many of them had travelled to the region as pilgrims heading towards Mount Kailash in Tibet, one of the most sacred sites in Hinduism. The flash floods have therefore raised particular concern in India over the safety of pilgrims caught in the disaster.

The United States and several other countries have also reported nationals missing. According to the National Tourism Board, 65 Americans, 51 Malaysians, 35 Australians and 33 British nationals were among those unaccounted for. The figures underline the international nature of the disaster, with the affected region attracting tourists, trekkers and pilgrims from several countries. Ukraine's Foreign Ministry separately said 55 Ukrainian nationals were missing. The ministry said the figure included two tourist groups comprising 47 and seven people, along with one Ukrainian woman who had been travelling with a foreign tour group. Officials are continuing efforts to establish the whereabouts of those missing and provide information to their families.

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The situation is also severe on the Chinese side of the border. Chinese state media reported at least three deaths and 558 people missing in Gyirong County in Tibet. Chinese state broadcaster CCTV said 260 of those missing were foreigners. China's foreign ministry also said nearly 100 Chinese citizens were missing on the Nepal side of the border. The differing figures released by Nepalese, Chinese and foreign authorities reflect the difficulties of tracking people across a remote international border following a major natural disaster. Some travellers may have been separated from their groups, while damaged communications and disrupted roads have made it difficult for families and authorities to establish contact.

The floods were triggered after a glacier collapse in Tibet sent a large volume of water into the border region. The resulting flash floods swept through affected areas with little warning, damaging infrastructure and disrupting transport routes. Rescue teams in both countries have been working to locate survivors and determine the fate of those still missing. The disaster has particularly affected areas frequented by international visitors. Pilgrimage routes and trekking destinations in the Himalayan region can become difficult to access even under normal circumstances, and the destruction caused by the floods has further complicated rescue and evacuation efforts.

As search operations continue, officials are expected to revise casualty and missing-person figures as information is verified. Authorities are also working through diplomatic channels to identify foreign nationals who may be stranded or missing and to coordinate assistance for their families. The catastrophe has consequently developed into a major international rescue effort, involving authorities from Nepal and China as well as governments seeking information about their citizens. With hundreds of foreigners still reported missing and communication remaining difficult in parts of the affected region, the final human toll of the disaster is likely to become clearer only after rescue teams reach more isolated areas and complete their searches.

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