The head of the United Nations (UN) nuclear agency says his experts are "not going anywhere" after they crossed to Russian-held territory in Ukraine to reach Europe's biggest atomic power plant, where both sides warn of potential catastrophe.
An International Atomic Energy Agency (IAEA) inspection team braved intense shelling to reach the Zaporizhzhia nuclear power plant, arriving after a delay of several hours in a large convoy with a heavy presence of Russian soldiers nearby.
