A reactor at a nuclear power station in the south of Ukraine has been shut down following an electrical failure but authorities said radiation levels were not elevated.
The Emergency Situations Ministry said the second reactor of the Yuzhno-Ukrainskaya Nuclear Power Station was shut down following the failure of its main transformer late on April 16 and it was unplugged from the country's energy grid.
The ministry said radiation and fire safety levels were "normal."
Ukraine is home of the now defunct Chornobyl nuclear plant whose fourth reactor exploded in April 1986 with fallout hitting a large part of Europe.
The explosion remains the world's worst nuclear disaster.
Based on reporting by AFP and UNIAN