A Russian drone attack caused significant damage to the radiation shelter of the Chernobyl nuclear power plant overnight, Ukrainian President Volodymyr Zelenskyy said on Friday.
Chernobyl was the site of the world's worst civil nuclear catastrophe when one of its four reactors exploded in 1986. That reactor is now enveloped by a protective shelter, known as a sarcophagus, to contain the lingering radiation.
The Russian drone struck the shelter of the destroyed power unit at the plant, causing a fire that has since been extinguished, he said.
"As of now, radiation levels have not increased and are being constantly monitored," Zelenskyy said, adding that an initial assessment had found significant damage.
"The only country in the world that attacks such sites, occupies nuclear power plants, and wages war without any regard for the consequences is today’s Russia," he said.

Injuries in Tibet rises to 76 after earthquake, death toll remains at 16
Tunisian police clash with protesters in capital on day of heightened tensions
New York City bans horse-drawn carriages from June 2028
Deadly fire at Canada military base caused by live grenade exercise, army says
France reports first human case of livestock virus Shamonda
