The leaders of France and Germany were carrying a new peace initiative to the Ukrainian and Russian capitals Thursday, amid a flurry of high-level diplomacy to end what French President Francois Hollande called a war on Europe's edge.

A Russian initiative to host peace talks this month between the Syrian government and its opponents appears to be unraveling as prominent Syrian opposition figures shun the prospective negotiations amid deep distrust of Moscow and concerns the talks hold no chance of success.