Russia has been shipping refined petroleum to North Korea in volumes that may violate the U.N. Security Council’s restrictions, U.S. National Security Council spokesperson John Kirby said on May 2, according to Reuters. The reports came after the Financial Times wrote that Moscow was defying U.N. sanctions by supplying North Korea with oil, likely in exchange for weapons. Pyongyang is subject to a strict cap on oil transfers, imposed by the U.N. Security Council in 2017 after a series of nuclear weapons tests. Moscow supplied over 165,000 barrels of refined petroleum to North Korea in March al…