The number of people killed in Nepal by two major earthquakes has surpassed 8,500, making the disaster the deadliest to hit the Himalayan country on record, as rescuers on Sunday searched for dozens of people still missing in remote villages.

Prime Minister Sushil Koirala told reporters on Sunday that 58 foreigners had died in the two earthquakes. Koirala said 112 foreigners were still unaccounted for, although many of those could be backpackers who choose not to register with authorities when they leave the country.

The death toll from the two quakes now stands at 8,583, the home ministry said on Sunday.

The previous deadliest earthquake to strike the country - in 1934 - killed at least 8,519 in Nepal, as well as thousands more in neighboring India.