An avalanche struck a Himalayan base camp in Nepal on Monday, leaving at least seven climbers dead and four others missing, local officials said, after a cyclone produced heavy snowfall in the famed mountaineering region.

Three U.S. citizens were among the dead when an avalanche struck the base camp of a Himalayan peak in Nepal, local police said. A Canadian, an Italian, and two Nepali nationals also died in the avalanche at Yalung Ri's base camp,

A massive avalanche swept down Annapurna I in Nepal on October 26, sending a towering cloud of snow into North Annapurna Base Camp at around 4,100 meters. Footage shows a huge wall of snow breaking loose from the mountain’s steep face before rushing toward the camp.

WATCH the moment a massive avalanche breaks free from the steep face of Annapurna I, one of the world’s highest and most formidable peaks. On October 26, trekkers and guides at the North Annapurna