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Washington, DC – The United States has dismissed as "ludicrous" Russia's claim that it was responsible for a drone attack against the Kremlin, an incident that risks inflaming international tensions. White House National Security spokesman John Kirby denied on Thursday any US involvement in the attack on Wednesday, which Moscow said targeted President Vladimir Putin. Kirby stressed that Washington is not even aware of the details of what happened. The United States had nothing to do with this," Kirby told CNN. "We don't even know exactly what happened here, but I can assure you the United States had no role in it whatsoever." Earlier on Thursday, Kremlin spokesperson Dmitry Peskov said the US, a key ally of Ukraine, was "undoubtedly" behind the attack.