Ukraine’s military intelligence has claimed, without offering evidence, that Russia is plotting a “large-scale provocation” at a nuclear power plant it occupies in the southeast of the country with the aim of disrupting a looming Ukrainian counteroffensive.

Kyiv came under an unusual daytime attack Monday, just hours after officials reported a barrage of strikes against the Ukrainian capital and other parts of the country. Follow here for live news updates.

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Ukrainian officials said that more than 40 drones were intercepted over the capital hours before residents celebrated Kyiv Day to mark the city’s founding. Falling debris may have killed one person.

Russia launched a fresh "massive" wave of attacks on Kyiv in the early hours of Tuesday and air defence systems were engaging incoming targets, city officials said, as air raid sirens blared in several other regions.