August 27, 2014: Smoke rises during shelling in the town of Novoazovsk, eastern Ukraine. Separatist rebels shelled a town in southeastern Ukraine on Wednesday, raising fears they are launching a counter-offensive on government-held parts of the region, one day after the leaders of Ukraine and Russia met to discuss the escalating crisis. (AP Photo/Sergei Grits)
A leader of pro-Russian separatist rebels in eastern Ukraine has reportedly admitted that thousands of Russians have been fighting alongside his troops.
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