The warning comes as the US, South Korea, and Japan continue to expand trilateral military exercises in response to Pyongyang’s growing nuclear arsenal.

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.

The federal government has sanctioned alleged North Korean hacker Song Kum Hyok for illegal activities related to his participation in the Andariel hacking group. Song has participated in malicious cyber activities,

Russia’s foreign minister has warned the U.S., South Korea and Japan against forming a security partnership targeting North Korea.