VIENNA, Austria (AFP) — A drone hit the Zaporizhzhia nuclear power plant in Russian-occupied southern Ukraine, the United Nations nuclear agency has said, citing local officials.

The International Atomic Energy Agency (IAEA) posted on social media that the Russian-run plant’s operator informed it that a drone had hit the turbine building on Saturday, “reportedly causing a hole in its wall.”

Russian media carried a statement from state-owned nuclear power firm Rosatom accusing Ukraine of a deliberate attack — a claim strongly denied by Kyiv.

Close to the front line in southern Ukraine, Zaporizhzhia is the biggest nuclear power plant in Europe.

Moscow and Kyiv have repeatedly accused each other of risking a nuclear catastrophe with attacks since it was captured by Russia’s forces in 2022.

“There should be no attack of any kind from or against the plant,” IAEA chief Rafael Grossi was quoted as saying in the agency’s X post late on Saturday. “Attacking nuclear sites is like playing with fire.”

Rosatom alleged the drone was controlled via a fiber-optic cable, which ruled out “the possibility of an accidental strike.”

“Today, we have come one step closer to an incident that is highly likely to affect even those who live far beyond the borders of Russia and Ukraine,” Rosatom CEO Alexei Likachev told Russian media.

Rejecting the accusations, Ukraine’s foreign ministry said in a statement that they lacked “logic.”

“It is unclear why Ukraine would strike its own nuclear power plant located on its own territory, which it itself seeks to regain under its sovereign control,” the ministry said.

“We consider these statements as yet another information operation by the occupying state.”

The strike blew a hole in the wall of the machine room but did not damage core equipment, Rosatom said.

Authorities in Russian-occupied Zaporizhzhia in April accused Ukraine of carrying out a strike which they said killed a transport worker.