India, Aug. 27 -- China has warned that a barrier lake near the Tibet-Nepal border could breach within 72 hours, adding a fresh threat to rescue operations after a devastating mudslide and flash flood killed hundreds and left more than a thousand people missing across the region.

Chinese state broadcaster CCTV reported that 558 people were missing in Tibet after a massive mudslide struck the border area.

China has also reported three deaths on its side of the border.

The disaster sent a sudden surge of water and debris into the Lhende River near Gyirong, close to the Nepal border.

The resulting floodwaters travelled downstream through the Bhote Koshi and Trishuli river systems, devastating communities and destroying roads, houses and ...