The head of the U.N.'s atomic watchdog agency on Sunday condemned a Ukrainian drone strike on one of six nuclear reactors at the Russian-controlled Zaporizhzhia Nuclear Power Plant in Ukraine.

Catch up on key developments and the latest in-depth coverage of Russia's invasion of Ukraine.

Catch up on key developments and the latest in-depth coverage of Russia's invasion of Ukraine.

Enerhodar Mayor Dmytro Orlov speaks to NPR about the risks of attacks and nuclear disaster with Ukraine's Zaporizhzhia plant under Russian occupation.

The international atomic watchdog has been to some of the world's toughest locations, but nothing quite like Europe's largest nuclear power plant in an active war zone.

The agreement came days before Iran was likely to be censured for failing to cooperate with the International Atomic Energy Agency.

Nuclear inspections have been a key part of the Iran nuclear deal. International inspectors stand to permanently lose access to key sites, unless the U.S. and Iran can find a way forward.