On 2 April 2021, President Joe Biden had his first telephone conversation with Ukrainian President Volodymyr Zelensky.[65] On 13 April, Biden had a telephone call with Russian president Putin; Biden "emphasized the United States' unwavering commitment to Ukraine's sovereignty and territorial integrity"; Biden also voiced U.S. concern "over the sudden Russian military build-up in occupied Crimea and on Ukraine's borders, and called on Russia to de-escalate tensions."[66][67] Biden and Putin agreed to meet in a "third country" in the coming months to discuss the subject.[67]