Russia overnight attacked Ukrainian energy facilities in two regions with drones, causing disruptions to electricity supplies, the national power grid operator said on Friday.
Ukrenergo says power supplies have been already restored to most consumers in the northern Chernihiv and Zhytomyr regions.
Russian missile and drone attacks on Ukraine's energy sector have intensified since the spring, resulting in blackouts in many regions and forcing Kyiv to start large-scale electricity imports from the European Union.