President Volodymyr Zelensky of Ukraine called the damage “significant” but said there were no signs of radiation leaks. A Kremlin spokesman denied that Russia had carried out the strike.

Ukraine said a Russian drone crashed into the containment structure, starting a fire, but so far radiation levels have stayed constant.

Russia’s Defence Ministry has claimed that its air defence systems supposedly shot down 40 Ukrainian drones overnight. Meanwhile, Russian Telegram channels reported drone strikes on the Saratov oil refinery and over a dozen explosions near Engels,