A 15-year-old boy told the BBC he survived by drinking water from wet clothes and eating clarified butter.

Elsewhere, a woman was pulled from a collapsed block where she had been trapped alongside three bodies.

Meanwhile, bad weather is hampering the delivery of relief to remote villages, a Nepali government spokesman said.

The government has been criticised for its response to the disaster.

Outside Kathmandu, the relief effort has relied heavily on helicopters, with mountain roads blocked by landslides triggered by the earthquake.