The U.S. put Russia and China on notice that it is unhappy with their enforcement of sanctions on North Korea by taking action Wednesday against companies in those countries it said aided North Korea’s shipping industry.
North Korea’s shipping sector has long been on Washington’s radar. In February, the Treasury Department identified a variety of shipping practices that it said Pyongyang uses to evade sanctions. It said the North Korean shipping industry is the “primary means” by which Pyongyang funds its nuclear weapons and...