The United States says.... it trusts South Korea to implement sanctions against North Korea.<br /> The U.S. State Department told Yonhap News on Wednesday,... that it considers the South Korean government a reliable partner in the maritime implementation of the UN Security Council resolutions.<br />Seoul faces allegations of letting shipments of North Korean coal into the country...., which would be a violation of UN Security Council resolutions that prohibit importing North Korean coal or mineral resources.<br />The State Department said,... Washington and Seoul are closely cooperating,... and that it's aware that the South has opened an investigation into the claims. <br />