In late December 2017, it was reported that Chinese and Russian-flagged tanker ships had been observed conducting at-sea transfers of oil and petroleum products to North Korean ships over the course of the previous year, violating sanctions imposed by the US and United Nations.
2017年12月下旬，据报道挂有中国和俄罗斯国旗的油轮在过去一年中被发现向朝鲜轮船转运海上石油和石油产品，违反了美国和联合国的制裁。