US President Barack Obama's national security adviser said it would be a "grave mistake" for Russia to send military forces into Ukraine and that it is not in the interest of Russia, Europe or the US to see Ukraine split apart.
Speaking on NBC's Meet the Press, Susan Rice was asked about a possible scenario in which Russia would send forces into Ukraine to restore a government more friendly to Moscow.
"That would be a grave mistake," Rice said. "It's not in the interests of Ukraine or of Russia or of Europe or the United States to see a country split."
"It's in nobody's interest to see violence return and the situation escalate," she added.
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