The Wonsan Kalma resort was opened in a grand ceremony last month by North Korea's leader, Kim Jong Un, who hailed it as a "world-class tourist and cultural destination". The details of how this resort was built have been shrouded in secrecy in a country largely closed to the outside world.

Song Kum Hyok is accused of masterminding a scheme in which North Korean cyber operatives posed as U.S. remote IT workers for unwitting companies.

North Korean leader Kim Jong Un said he wants the luxury resort on the eastern seacoast to become a "world destination," but the country has been reluctant to allow in foreign tourists.

A North Korean defector is filing civil and criminal charges against the country's leader Kim Jong Un for abuses she faced while detained in the country. Choi Min-kyung fled the North to China in 1997 but was forcibly repatriated in 2008. She said she was sexually abused and tortured after her return.

Washington has said the treatment of Glavprodukt, the only U.S. company Moscow has seized, will influence a planned reset of U.S.-Russia relations.