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The drone attacks by Ukraine come as Russia prepares for Victory Day celebrations marking the end of World War Two.
Ukraine's president Volodymyr Zelensky has said Ukraine could not guarantee the safety of foreign officials planning to attend the Red Square event which will be leveraged as a propaganda tool for Russian President Vladimir Putin.
Victory parade preparations appear to include drills on how to evacuate top officials from Red Square, according to east European news outlet NEXTA amid likely nervousness in the Kremlin over whether it's biggest annual display of military might can pass off without a hitch.