In a statement published on its website on Sunday, Ukrenergo said the outage occurred on Saturday, near midnight, at the North (Petrivtsi) substation, causing blackouts in the capital city of Kiev and the Kiev region.

Ukrenergo Acting Director Vsevolod Kovalchuk said workers switched to manual mode and started restoring power after 30 minutes. Power was fully restored after just over an hour, Kovalchuk said.