BRUSSELS (Reuters) - The European Union tightened sanctions on Russia on Friday over its role in the Ukrainian conflict, restricting access to financing for top Russian banks, defence and energy firms and freezing the assets of senior politicians and rebel leaders.
The United States was set to follow suit with its own tougher sanctions later on Friday, heaping pressure on Russian President Vladimir Putin after Russia annexed Ukraine's Crimea region and sent troops to back pro-Russian separatists in eastern Ukraine.
