Ukraine's President Volodymyr Zelensky has warned war is coming back to Russia after drone attacks on the capital Moscow. Mr Zelensky said attacks on Russian territory were an ‘inevitable, natural and absolutely fair process’ of the war between the two countries. Russia's defence ministry said three Ukrainian drones were downed on Sunday, with two crashing into offices. Vnukovo Airport, near Moscow, was briefly shut. In a video address Mr Zelensky said that Ukraine was getting stronger. ‘Today is the 522nd day of the so-called Special Military Operation, which the Russian leadership thought would last a couple of weeks,’ he said. "Gradually, the war is returning to Russian territory - to its symbolic centres and military bases; an inevitable, natural and absolutely fair process.’ Former Russian President Dmitry Medvedev said again on the 30th July that Moscow would have to use a nuclear weapon if Kyiv's ongoing counter-offensive was a success.