The U.S. said it's ready to intensify pressure against Russia for supporting rebels who've stepped up attacks on Ukrainian troops as the European Union tussled over new sanctions in the face of opposition from Greece.
Russia's War Against Ukraine
Bloomberg: US ready to push Russia on Ukraine as EU wrangles on sanctions
Residents assess damages inflicted to houses following shelling between Ukrainian army and pro-Russian separatists, on Jan. 28, 2015 in the eastern Ukrainian city of Donetsk.
