BRUSSELS, May 22 – NATO Supreme Allied Commander in Europe General Philip Breedlove said the alliance is seeing "some movement" of Russian troops on the Ukraine border, but its significance is unclear.

Russian officials have said on several occasions recently that they are withdrawing their troops, and NATO has repeatedly said it has seen no evidence of that. But in the past day or so, surveillance has revealed actions by Russian troops, including the loading up of mechanized vehicles, which could suggest a pullback.