MOSCOW, March 18 (Reuters) - Russian Foreign Minister Sergei Lavrov told U.S. Secretary of State John Kerry that Western sanctions were "unacceptable" and "will not remain without consequences", the ministry said in a statement on Tuesday.
The two senior diplomats spoke by telephone hours after President Vladimir Putin signed a treaty in the Kremlin making Ukraine's Crimea peninsula part of Russia, despite an outcry from Kiev and the West.
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