U.S. official : The United States has been clear in our message to the Assad regime that we are determined and prepared to impose costs on them if they cross a red line. Ukraine official : Ukraine , Russian ministers talk , but no signs of breakthrough . Putin denies sending troops into Crimea , says `` local militias '' are involved . U.S. Secretary of State John Kerry says Russia made up reasons to intervene .
U.S. official : Germany 's leader is trying to set up an exit strategy for Russia 's Putin . Ukraine official : Ukraine , Russian ministers talk , but no signs of breakthrough . Putin denies sending troops into Crimea , says `` local militias '' are involved . U.S. Secretary of State John Kerry says Russia made up reasons to intervene .