The diplomatic push comes amid alarm over Russia’s military buildup on Ukraine’s borders, fanning fears it plans to seize more territory following its lightning annexation of Crimea.
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Turchynov said Russian President Vladimir Putin had so far resisted intense international pressure and refused all contacts with Kiev aimed at resolving the worst breakdown in East-West relations since the Cold War.
Yanukovych told the new pro-West authorities in Ukraine who took over after he fled to Russia last month that “sooner or later, most likely sooner” they would be held responsible for their actions.
From Egypt, where the nation’s first democratically-elected president Islamist leader Mohamed Morsi was toppled in July by the army, to Ukraine where Viktor Yanukovych, brought to power in 2010 polls, fled his post after months of street protests, the US has had to fine-tune its response.
The crisis in Kiev has evolved into a Cold War-style standoff between Moscow and the West over the future of the strategic nation sandwiched between them.
The European Union and United States cranked up pressure on Yanukovych to impose serious reforms to end a standoff that has turned parts of Kiev into a war zone patrolled by masked protesters and that has left three activists dead.