The U.S. has accused North Korea’s government of covertly funneling “thousands” of artillery shells to aid Russia in its war in Ukraine.

National Security Council coordinator for strategic communications, John Kirby, told a virtual press briefing on Wednesday that Pyongyang may be masking the movement of weapons through countries in the Middle East and North Africa thought to be transfer points, Reuters reported. He did not elaborate with specificity as to the location of the transfer points but said, “We do have a sense of where they’re going,” adding that the U.S.  would “continue to look at what our options are.”

Kirby said that while the number of munitions supplied by North Korea is “significant,” it falls short of having an appreciable impact on the war’s trajectory.