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The diplomat called the Russian leader's visit to the peninsula illegal.

Further, Yelchenko spoke of the concentration of Russian arms along the border.

"Yelchenko also drew Eliasson's attention to the concentration of Russian arms along the Russian-Ukrainian border, Crimea and Donbas," the report says.

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As UNIAN reported earlier, Ukraine's Foreign Ministry expressed its strong protest over the uncoordinated visit of Russian President Vladimir Putin to Crimea on August 19.

Putin arrived in Crimea on Friday, where he held a meeting with Russian Security Council members.