Russian president Vladimir Putin is watching the developing situation in eastern Ukraine with "great concern", his spokesman has said.
Dmitry Peskov was asked about calls from pro-Russian separatists in eastern Ukraine for Putin to help defend them against government forces.
"Unfortunately, there's a great many such appeals coming from the Eastern Ukrainian regions addressed directly to Putin to intervene in this or that form," he said. "The president is watching the developments in Eastern Ukraine with great concern."
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