Putin hits back as NATO warns Moscow against attacking Ukraine

U.S. State Secretary Antony Blinken and Latvian President Egils Levits pose for media in Riga, Latvia November 30, 2021. REUTERS/Ints Kalnins/Pool

(Adds Blinken comment, paragraph 12)

RIGA/MOSCOW (Reuters) - Russia would pay a high price for any new military aggression against Ukraine, NATO and the United States warned on Tuesday as the Western military alliance met to discuss Moscow's possible motives for massing troops near the Ukrainian border.