A new monitoring mission from the U.N. nuclear watchdog arrived on Saturday at the Russian-held Zaporizhzhia nuclear power plant in southeastern Ukraine, Russia's Rosatom company said, after weeks of delay caused by military activity around the site.

Ukraine has condemned the breach of its sovereignty by IAEA officials entering Zaporizhzhia nuclear plant via Russian-occupied land. The mission faced delays due to military activity, with both sides blaming each other for safety breaches.

Ukrainian Foreign Ministry sent note of protest to International Atomic Energy Agency over restrictions on its monitoring mission at plant.

Russian troops seized the Zaporizhzhia plant, Europe's largest with six reactors, in the first weeks of their February 2022 full-scale invasion of Ukraine. It produces no electricity at the moment.

International atomic monitors are for the first time traveling through Russian territory rather than Ukraine to reach Europe’s biggest nuclear-power plant, said three diplomats briefed on the matter — a blow to Kyiv’s desire to avoid international recognition of the Kremlin’s ownership claims.

Ukraine said on Sunday it condemned a "breach of territorial sovereignty" by employees of the U.N. nuclear watchdog who visited the Russia-held Zaporizhzhia nuclear power plant in Ukraine via Russian-occupied territory.

A new team from the International Atomic Energy Agency (IAEA) arrived at the Russian-occupied Zaporizhzhia nuclear power plant in Ukraine on March 1, marking the first time the agency's monitors reached the site through the occupied territory.

Radio Free Europe/Radio Liberty correspondent Rikard Jozwiak and Russian nuclear corporation Rosatom have reported a new rotation of International Atomic Energy Agency (IAEA) experts arriving at the Russian-occupied Zaporizhzhia Nuclear Power Plant (NPP),