Dozens of workers are believed to be trapped after a tunnel collapse at a mountain power station.
The collapse was triggered by a sudden flood and a massive ice slide.
Food and water inside the sealed space give hope that some workers are still alive.
Rescue teams from several countries are using modern tools to try to reach them.
Officials believe the workers may still be alive because supplies of food and water were left inside the sealed chamber.
Rescue operations involve Nepalese forces and international experts from India, China, Korea and Australia, using advanced equipment.
The situation remains dangerous, but teams are working steadily to reach any survivors.
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