The Russian politician insulted Klimkin for his promise to return freedom to the Crimeans, Censor.NET reports citing Rogozin's Twitter.
''What a slowpoke! They have been free for three years now,'' Rogozin wrote.
Earlier, Ukrainian Foreign Minister Pavlo Klimkin commented on the third anniversary of the illegal annexation of Crimea by Russia. He wrote on Twitter that the freedom taken from the peninsula's residents "will be returned."