Volodymyr Zelensky said Russia is moving a significant part of its air defences to protect a handful of prime targets, including Moscow, as Ukraine’s long-range drones hammered sites

Vladimir Putin has pulled one of his air defences from the front line and moved it to Moscow following a spate of Ukrainian drone attacks.

"We are preparing new, entirely justified steps in response to Russia's prolongation of the war and its strikes against Ukraine," President Volodymyr Zelensky said.