Russia delivered more than 165,000 barrels of refined petroleum to North Korea in March alone, a White House official said Thursday, noting its shipments thus far have already exceeded Pyongyang's annual import cap mandated by the UN Security Council. National Security Communications Advisor John Kirby made the remarks as Washington is working in tandem with South Korea, Japan and other partners to roll out new sanctions this month against those aiding in transfers of weapons and refined petrole