Russian President Vladimir Putin warned that further economic sanctions over the Ukraine crisis may lead Russia to reconsider participation by U.S. and European Union companies in energy and other key industries. While his government has prepared measures to retaliate for penalties imposed by the U.S. and its allies, Putin told reporters in Minsk, Belarus, yesterday that he doesn’t consider them necessary for now, though that may change. If sanctions continue, “then of course we will have to consider who’s working and how in the Russian Federation, in the key sectors of the Russian economy, including energy,” he said. “We really don’t want to take these reciprocal steps.” Putin’s remarks added uncertainty for companies that have stakes in Russia’s energy industry, including Royal Dutch Shell Plc and Exxon Mobil Corp. (XOM) , which is planning Arctic drilling in an alliance with Russian state-controlled OAO Rosneft. (ROSN) The Russian leader spoke […]