Russia launched 315 drones at Ukraine overnight into Tuesday, in what Ukrainian President Volodymyr Zelensky said was “one of the largest” attacks on the capital Kyiv, with local officials in the southern port city of Odesa also reporting a maternity ward there had been hit.

The relocation comes in the wake of Ukraine's Operation Spiderweb, the unprecedented mass drone strike on June 1 that targeted four Russian air bases deep inside the country.