At least seven people including five foreign nationals went missing after an avalanche hit the trekking route in central Nepal’s Annapurna mountain range, local media reported on Saturday.

Two local guides and five foreign nationals including four South Koreans and one Chinese national who were trekking in the Annapurna Base Camp have been out of contact since Friday afternoon, reported The Kathmandu Post, a local daily in Nepal’s capital.

The Annapurna circuit trek is a famous trekking route some 230 kilometers (145 miles) long.

“We have been informed that four out of nine Korean nationals who were trekking

Read more: Trekkers from South Korea, China missing in Nepal