KATHMANDU — More than 1,300 people were reported missing and more than 270 were confirmed dead after flash floods and landslides at the Nepal-Tibet border.

They included hikers and climbers from around the world, many of whom flock to the Himalayan nation to test themselves on some of the world's highest peaks, as well as Hindu devotees on pilgrimages.

These figures are likely to change, which is not uncommon after a major disaster.

Double-counting of dual nationals, matching bodies with people listed as missing and the chaos of a calamity can all contribute to fluctuations both upwards and downwards in the figures.

In total: at least 1,381

Nepal's disaster agency said 823 people were unaccounted for on Thursday, a figure that included at least 517 foreigners. It did not give a breakdown of the number of Nepalis or nationalities of the foreigners.

Nepal's tourism board on Thursday put the number of missing tourists – Nepali and foreign – at 644 in total. Its further breakdown of the nationalities is included below.

Across the border with Tibet, China said 558 people – including 260 foreigners – were missing.

Nepal 

The new Nepal Tourism Board figures Thursday said 127 Nepali visitors were among the 644 it listed as missing.

It was not immediately clear how many Nepali residents of the area were missing.

China 

China's foreign ministry said nearly 100 Chinese nationals were among the missing in Nepal.

That was in addition to the 558 including 260 foreigners missing on its side of the border.

India 

Nepal's new tourism board figures Thursday showed 178 people from India were missing.

United States 

Sixty-five US citizens were missing, the Nepal Tourism Board said Thursday, a dramatic leap from a day earlier, when the figure had been less than 15.

Ukraine 

Ukraine's foreign ministry cited Nepal's Tourist Police as saying 53 Ukrainian nationals were missing, a figure matched by the Nepal Tourism Board.

Malaysia 

Prime Minister Anwar Ibrahim said Thursday that more than 50 Malaysians in Nepal are unreachable.

The Nepal Tourism Board put the number at 51.