Nepali rescuers faced challenging conditions on Sunday as search operations after catastrophic floods entered a 12th day, buoyed by the extraordinary rescues of four survivors.

The glacial and mountain collapse on the China-Nepal border killed at least 1,384 people and left more than 5,500 missing across the two countries.

Rescuers found two more people alive on Saturday, joining two saved the day before in what have been described as miraculous tales of survival.

Three of those have been found in hydropower tunnels where the government initially said it believed more than 100 workers could be alive.

“Search and rescue is going on at the tunnels despite geography, adverse weather and lack of connectivity,” Energy Minister Biraj Bhakta Shrestha told AFP.

Rescue workers were experiencing “multiple challenges”, he said.