Editor’s note: This is a developing story and is being updated.

Andriy Yermak, head of Ukraine’s Presidential Office, is traveling to the U.S., a source close to the Presidential Office told the Kyiv Independent on June 3.

The visit follows the second round of Russian-Ukrainian peace talks in Istanbul on June 2, which focused on a new prisoner exchange but yet again failed to achieve a breakthrough in peace efforts.

President Volodymyr Zelensky has urged U.S. President Donald Trump to impose additional sanctions on Russia if the peace talks stall.