Ukraine's drone attacked a Moscow residential building. Moscow mayor confirmed attack on Mosfilm Tower with no casualties. Russia tightened security for Victory Day, no military vehicles in parade. Drone struck 7 km west of Kremlin, 3 km from Defence Ministry. Drone flew low, causing damage to Mosfilm Tower's upper floors. Ukraine's FIS said parade is more like a military lockdown. Russian authorities reported hundreds of air defense systems arrived in Moscow. Kremlin proposed ceasefire for Victory Day, but officials refuse to contact Kyiv