A strong magnitude-7.9 earthquake shook Nepal's capital and the densely populated Kathmandu Valley before noon Saturday, collapsing houses, centuries-old temples and cutting open roads in the worst tremor in the Himalayan nation in over 80 years.
Dozens of people with injuries were being brought to the main hospital in central Kathmandu. There was no immediate estimate on fatalities.
Several buildings collapsed in the center of the capital, the ancient Old Kathmandu, including centuries-old temples and towers, said resident Prachanda Sual.
He said he saw people running through the streets in panic. Ambulance sirens blared and government helicopters hovered overhead.
National radio warned people to stay outdoors and maintain calm because more aftershocks were feared. A 6.6-magnitude aftershock hit about an hour after the initial quake.