Live updates: Massive flash flood on Nepal-Tibet border leaves hundreds missing, including U.S. tourists

What to know Around 165 people have been killed, and hundreds more are missing after catastrophic floods swept through towns and valleys along the border between Nepal and China's Tibet region. Officials say the death toll is expected to rise. More than 500 foreigners from 32 countries are among those still unaccounted for in the rugged mountainous region, which is popular with pilgrims and trekkers. They include 65 people from the U.S., as well as 178 from India, 53 from Ukraine, 51 from Malaysia, 35 from Australia, 33 from Britain, and 25 from Canada, the Nepal Tourism Board said, adding that there are also 127 missing travelers from Nepal. Chinese officials said three people were dead, two had been rescued and 558 people were missing after a mudslide at a land crossing in Tibet’s Gyirong county, including 260 foreign nationals. It was not immediately clear whether China and Nepal were counting some of the same people. Videos show bridges being cracked apart and swept away in Nepal’s hardest-hit Rasuwa region by the force of raging waters filled with mud and debris. The exact cause of the disaster was not immediately clear, but officials in Nepal said it appeared to be "triggered by a landslide associated with a glacial event in the Himalayan region, sending a sudden and destructive surge of water downstream."

Follow live updates as rescuers search for hundreds of people missing after a catastrophic flood hit the border between Nepal and China’s Tibet region.