Hundreds of Russian drones flying from all directions attacked Kyiv overnight into Thursday in an apparent new Russian tactic, marking a second consecutive night of ferocious attacks on Ukraine.

Nighttime assaults on the Ukrainian capital of Kyiv have intensified in the fourth year of Russia's full-scale invasion, with the number of drones sometimes exceeding 700. Swarms of 1,000 drones could soon become the norm,

Russia launched its largest drone and missile bombardment of Ukraine overnight into Wednesday, according to Ukrainian President Volodymyr Zelenskyy.

Between January and June, the number of Russian drone and missile attacks exceeded 23,000, a roughly 605% increase compared to the same period last year.

Ukraine's security agency says it has killed Russian agents suspected of assassinating a senior officer in Kyiv.

The more drones in a single attack, Kuzan says, the more Ukraine hard-pressed air defence units struggle to shoot them down. This forces Kyiv to fall back on its precious supply of jets and air-to-air missiles to shoot them down.