Drone strikes hit the site of Ukraine’s Zaporizhzhia nuclear power station on Sunday (7 April) in what the International Atomic Energy Agency said was a serious incident that endangered nuclear safety and security.

The agency’s director-general Rafael Grossi condemned the strikes. In a statement on X he confirmed at least three direct hits against the main reactor containment structures. “This cannot happen,” he said.

Grossi said it was the first such attack since November 2022, when he set out five basic principles to avoid a serious nuclear accident with radiological consequences.