Russian President Vladimir Putin attends a news conference after a meeting with Swiss President and Foreign Minister Didier Burkhalter at the Kremlin in Moscow

Russian President Vladimir Putin attends a news conference after a meeting with Swiss President and Foreign Minister Didier Burkhalter at the Kremlin in Moscow

Russian President Vladimir Putin attends a news conference after a meeting with Swiss President and Foreign Minister Didier Burkhalter at the Kremlin in Moscow, May 7, 2014. Russian President Vladimir Putin called on separatists in east Ukraine on Wednesday to postpone a referendum on independence for the mostly Russian-speaking region and said Moscow had withdrawn troops from the border with Ukraine. (RUSSIA – Tags: POLITICS) – RTR3O61G