Waves of Russian drones and missiles struck districts across the Ukrainian capital Kyiv early on Tuesday, damaging an apartment building, sparking fires and injuring up to 16 people, city officials said.

Russia has in recent months stepped up its aerial attacks. It launched almost 500 drones at Ukraine on June 10 in the biggest overnight drone bombardment of the war. Russia also pounded Kyiv on April 24, killing at least 12 people in its deadliest assault on the capital in eight months.