A drone armed with a warhead hit the outer shell of Ukraine’s Chernobyl nuclear plant, briefly starting a fire, in an attack Kyiv blamed on Russia.

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.

Ukrainian President Volodymyr Zelensky has condemned Russia for its latest attack which saw a drone strike the Chernobyl power plant. The war between Russia and Ukraine has almost been going on for the last three years as its anniversary, February 24, steps ever closer.