Russia and Ukraine agreed to a local ceasefire to allow for repairs of the backup power lines to the Zaporizhzhia nuclear plant, according to the United Nations’ nuclear watchdog.

The International Atomic Energy Agency (IAEA) said in a short statement on Friday that a truce had taken effect in southern Ukraine to enable the restoration of the 330-kilovolt supply line to Europe’s largest nuclear power plant.

“Demining activities are ongoing to ensure safe access for the repair teams,” IAEA Director General Rafael Mariano Grossi said on social media.

The local ceasefire, which the IAEA said it had helped to secure, comes shortly after the fourth anniversary of Russia’s full-scale invasion of Ukraine.

Russian forces have controlled the Zaporizhzhia nuclear plant since the first few weeks of the invasion.