KYIV, Ukraine (AP) — A combined Russian and missile attack in Kyiv overnight Tuesday left at least 20 people wounded, according to Ukrainian officials.

A mass drone attack struck several districts of the Ukrainian capital Kyiv early on Tuesday, damaging an apartment building and injuring up to 11 people, city officials said. Mayor Vitali Klitschko said swarms of drones continued to move towards the capital and warned of a danger of Russian missiles being deployed.

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.