Russia is effectively in control of the Chernobyl and Zaporizhzhia nuclear power plants, according to Rafael Mariano Grossi, the head of the International Atomic Energy Agency said Friday.
Chernobyl was the site of the world's worst nuclear disaster in 1986. Russian forces seized control of it last week.
The Zaporizhzhia plant just fell under Moscow's control, and during the fighting, a Russian projectile hit a building within the site, causing a localized fire.
None of the reactors were nearby, and they were unaffected. The fire has been extinguished and the radiation monitoring systems are fully functional.
Ukrainian staff are still at the helm of operations, Grossi said.
Grossi warned that the situation at Zaporizhzhia is “ very fragile."
He said it was "unprecedented" to run a nuclear plant while military operations raged nearby.