Hundreds of travellers are missing, including at least 291 foreign tourists, after a flash flood on the Nepal-Tibet border.
At least 18 people have been killed in Nepal - among the preliminary list of the missing are more than 100 people from India and 12 from the UK, according to its tourist board.
Chinese state media is also reporting "major casualties" in Tibet, which is controlled by China.
Verified videos from Nepal show a bridge being swept away and multi-storey buildings collapsing by the force of floodwaters.
Other images show houses partially submerged after muddy floodwater swept through Nepal's Nuwakot district.
Nepal's foreign minister says preliminary reports show it may have been caused by an earthquake triggering an avalanche, which led to flash floods.
Nepalese army rescues 88 from flood, with 15 helicopters mobilised
A spokesman for Nepal's army says 88 flood survivors have been rescued so far, with troops trying to rescue another 115 from the village of Mailung.
Rajaram Basnet tells the BBC that 15 helicopters have been mobilised for search and rescue operations.
The Ministry of Home Affairs in Nepal says huge loss of life and property is reported in Timure, Syabrubesi and Betrawati.
It says the flood caused damage to the Trishuli hydropower station and swept away bridges in different places.
What we know as flash flood hits Nepal, Tibet
At least 18 have died, and hundreds are missing after a flash flood hit Nepal and Tibet earlier today. Here's what we know:
- The flood hit early on Wednesday in Rasuwa, north of Nepal's capital Kathmandu
- Police say one man was found dead in Rasuwa, seven people in Nuwakot, six in Dhading and four in Gorkha
- The country's tourism board says it has identified around 400 missing travellers including 291 foreign nationals
- Chinese state media outlet CCTV is also reporting "major casualties" in Tibet, which is controlled by China
- Nepal's foreign minister says early information suggests it was caused by an earthquake triggering an avalanche
- The US embassy in Nepal says authorities have reported severe flooding in Rasuwa, and issued warnings for communities along the Bhote Koshi, Trishuli, and Narayani rivers
