Kathmandu, April 25 (ANI): A powerful, 7.9-magnitude earthquake shook Nepal's capital and the densely populated Kathmandu Valley on Saturday, collapsing houses, leveling centuries-old temples and cutting open roads.Dozens of people with injuries were being brought to the main hospital in central Kathmandu. There is no immediate estimate on fatalities. The Dharahara Tower, one of Kathmandu's landmarks built by Nepal's royal rulers in the 1800s and a UNESCO-recognized historical monument was reduced to rubble and there were reports of people trapped underneath.