Ukrainian President Volodymyr Zelenskiy condemns what he calls Russian "monsters" Video posted on social media shows beheading of a man believed to be a Ukrainian prisoner of war. Zelensky calls on Kremlin to "verify the authenticity of the recording" Kremlin responds by calling for the video to be "verified", adding: "In the world of fakes we live in, we must verify the authenticity" UN human rights mission in Ukraine says it is "horrified" after reviewing the video.