Pro-Russian forces tightened their grip on airports and strategic sites on Ukraine's Crimea peninsula on Friday despite US President Barack Obama warning Moscow not to intervene.

News - Russian troops deployed in Crimea as Obama warns Kremlin
SIMFEROPOL, Ukraine: The new Ukrainian government will hold its first cabinet meeting on Saturday, amid fears of secession in restive Crimea where pro-Russian forces are tightening their grip despite US warnings.
Heavily armed troops in uniforms with no national insignia took up positions around government buildings and the airport in Simferopol on Friday, as Ukrainian officials accused Russia of "naked aggression".
In Washington, a US defence official said Moscow was thought to have already sent "several h...
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