The west is prepared to "tighten the screws" further on Russia if it continues to arm rebels suspected of shooting down Malaysia Airlines flight MH17 in Ukraine, Philip Hammond, the foreign secretary, has said.
Russia's War Against Ukraine
Guardian: Hammond says West is ready to ratchet up sanctions against Russia
Russia's President Vladimir Putin speaks to journalists in the Belarus capital Minsk, on April 29, 2014, after attending a session of the Supreme Eurasian Economic Council .
