Russia has told the global nuclear watchdog that it is in control of the area around Ukraine's biggest nuclear power plant near the city of Zaporizhzhia, on the Dnieper river in southern Ukraine.
According to Russia, staff at the power plant are continuing their normal operations, the International Atomic Energy Agency (IAEA) says. Ukraine's nuclear operator says it is in touch with all its power plants and operations are continuing at all of them.
The Zaporizhzhia plant has six out of the country’s 15 nuclear energy reactors, the IAEA says.
There are reports of residents blocking roads near the city of Energodar, where the Zaporizhzhia plant is located.
Separately, Ukraine's nuclear authorities have asked the IAEA for help coordinating safety activities at the site of the Chernobyl nuclear plant in northern Ukraine, which has been seized by Russian troops.