KYIV, Nov 22 – During the massive attack in Ukraine on November 17, four substations of Ukrainian NPPs, identified by the International Atomic Energy Agency (IAEA) as important for nuclear safety, were damaged, the agency reported.

"Four of these substations and their power lines were impacted again by the attacks during the night of 16 November and early morning of 17 November, prompting Ukraine’s operating NPPs to reduce their power output as a precautionary measure," the agency reported on its website.