Russian forces have taken control of a town where workers at the defunct Chernobyl nuclear plant live, the governor of Kyiv region said on Saturday, and fighting was reported in the streets of the besieged southern port of Mariupol.

Ukrainian authorities said Friday that radiation levels had increased in the Chernobyl exclusion zone and warned the seizure of the nuclear plant by invading Russian troops could have "terrible consequences."

Ukrainian firefighters on Tuesday entered their fourth day in battling a grass and forest fire in the Chernobyl exclusion zone, still contaminated with radiation from the nuclear power plant disaster ...

To meet its growing electricity needs in its drive to develop oil resources in remote Arctic regions, Russia has built a floating nuclear power station, a project that detractors deride as a ‘Chernobyl on ice’.

The UN atomic watchdog used the 30th anniversary Tuesday of the Chernobyl disaster, the world's worst nuclear accident, to warn against ‘complacency’ in atomic safety.