Ukrainian Prime Minister Arseniy Yatsenyuk says "we are on the brink of disaster" and he urged Russian President Vladimir Putin to pull back his military from the country.
Ukraine's PM Warns "On Brink of Disaster"

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A convoy of hundreds of Russian troops headed toward the regional capital of Ukraine's Crimea region, a day after Russia's forces took over the strategic Black Sea peninsula without firing a shot. Pictured here, a Russian convoy moves from Sevastopol to Sinferopol in the Crimea, Ukraine, March 2, 2014.

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Soldiers without insignia guard buildings in the Crimean capital, a day after the Crimean prime minister called for Russian help, Simferopol, Ukraine, March 2, 2014. (Elizabeth Arrott/VOA).

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People mourn at a make-shift memorial for those killed in recent violence at Independence Square, Kyiv, Ukraine, March 2, 2014.

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A Crimean self-defense group with shields painted as the flag of the contested Ukrainian autonomous republic, Simferopol, Ukraine, March 2, 2014. (Elizabeth Arrott/VOA)