Nepalis queue for buses to leave Kathmandu and return to their villages in the aftermath of Saturday's earthquake in Nepal, April 29, 2015.[Photo/Agencies]

With many of the thousands injured in critical condition and hundreds still missing, the fatalities from Saturday's deadly temblor could soar up to 10,000, Koirala told the envoys of China, India, the United States here.

Meanwhile, around 9,000 people have been injured in the quake, Nepal Police officials said.

In the capital Kathmandu and other cities, hospitals quickly overflowed with injured soon after the quake, with many being treated out in the open or not at all.

At least eight personnel of the Nepalese Army have died, 11 were reported missing, while 28 were injured in accidents during rescue operations conducted after Saturday's massive earthquake, army spokesperson Brig. Jagadish Chandra Pokhrel said on Tuesday.

But even as international aid poured in, with volunteers reaching some of the remotest parts of the landlocked nation, it became clear that the earthquake may turn out to be worse than the one that claimed over 8,000 lives in 1934 in Nepal.

All the heritage treasures of the country were destroyed, killing the livelihood of tens of thousands depending on tourism. In the capital alone, the three palaces of the former royal Nepalese kings were destroyed by the quake, inflicting unspeakable harm to the nation in terms of culture and economy.

The United Nations said the quake had impacted 8 million in 39 districts, of which over 2 million live in 11 most severely affected districts.