Putin not done in eastern Ukraine, NATO's top general says

NATO Secretary General Jens Stoltenberg addresses a news conference after a meeting of North Atlantic Council (NAC) in Defense Ministers session at the NATO headquarters in Brussels, Belgium, June 24, 2015. REUTERS/Eric Vidal

BRUSSELS (Reuters) - Russian President Vladimir Putin is not done in eastern Ukraine, NATO's top commander said on Thursday, cautioning that Russia has been building up supplies on its border with Ukraine and keeping its military options open.

U.S. General Philip Breedlove, NATO's supreme allied commander, said the border between Ukraine and Russia was "wide open," allowing free movement of equipment and supplies.