A total of 3,726 people were confirmed killed in the quake, the government said on Monday. More than 6,500 were injured.

Another 66 were killed across the border in India and at least another 20 in Tibet, Xinhua news agency said.

Several countries rushed to send aid and personnel.

India sent helicopters, medical supplies and members of its National Disaster Response Force. China sent a 60-strong emergency team. Pakistan's army said it was sending four C-130 aircraft with a 30-bed hospital, search and rescue teams and relief supplies.

A Pentagon spokesman said a U.S. military aircraft with 70 personnel left the United States on Sunday and was due in Kathmandu on Monday. Australia, Britain and New Zealand said they were sending specialist urban search-and-rescue teams to Kathmandu at Nepal's request.

Britain, which believes several hundred of its nationals are in Nepal, was also delivering supplies and medics.

The disaster has underlined the woeful state of Nepal's medical facilities.

Nepal has only 2.1 physicians and 50 hospital beds for every 10,000 people, according to a 2011 World Health Organization report.