A Russian drone with a high-explosive warhead hit the protective containment shell of the Chernobyl Nuclear Power Plant in the Kyiv region during the night, Ukrainian President Volodymyr Zelensky said on Friday, adding that radiation levels have not increased.

Zelensky said that the strike damaged the structure and started a fire, which has been put out. The UN atomic agency did not attribute blame, saying only its team stationed at the site heard an explosion and were informed that a drone had struck the shell.