The US and European Union are poised to halt billions of dollars in oil exploration in Russia by the world's largest energy companies in sanctions that would cut deeper than previously disclosed.
Russia's War Against Ukraine
Bloomberg: Putin oil deals with Exxon, Shell imperiled by sanctions
Russia's President Vladimir Putin (2nd R) visits a refinery of Russian oil giant Rosneft in the Black Sea port of Tuapse in southern Russia, on Oct. 11, 2013.
