The head of the U.N. nuclear watchdog said on Tuesday his attempt to broker a deal to protect Ukraine's Russian-occupied Zaporizhzhia nuclear plant was still alive, and that he was adjusting the proposals to seek a breakthrough.

Rafael Grossi, head of the International Atomic Energy Agency, spoke to Reuters a day before he is expected to travel to Europe's largest nuclear power station in the Russian-occupied Zaporizhzhia region of southeastern Ukraine.