China and Russia have blocked a U.S. request made at the UN Security Council (UNSC) to stop oil transfers to North Korea, the U.S. Ambassador to the UN – Nikki Haley – confirmed on Friday.

The U.S. made the request following a submission of evidence to the 1718 committee that claimed North Korea conducted up to 89 prohibited ship-to-ship (STS) transfers involving oil in the first five months of 2018.

Haley, speaking alongside U.S. Secretary of State Mike Pompeo, reiterated that the U.S. had proposed the complete ban on exporting petroleum products to North Korea