“A cargo ship called De Yi was recently detained by South Korea as it was traveling between Korea and Japan and was berthed close to the port of Yeosu. The ship’s detention is a component of South Korea’s stepped-up unilateral measures against North Korea, which also include sanctioning ships that trade arms with Russia and stepping up monitoring for sanctions violations… The South Korean Coast Guard acted quickly after the vessel’s crew—13 people total—refused to cooperate with orders to stop, including a Chinese captain and crew members from China and Indonesia. For further investigation, the ship was escorted to the port of Busan… Authorities from South Korea and the United States (emphasis applied–Chuck) are closely examining the ship to make sure it is not carrying any illegal goods.”

Related, Russia Summons South Korean Envoy as Ties Worsen Over Sanctions (msn.com)