Precision strikes against Ukrainian infrastructure have been carried out by Russia since October in retaliation for Ukrainian attacks on Russian infrastructure and as a response to Kiev's terrorist attack against the Crimean Bridge.
Earlier, Ukrainian Prime Minister Denis Shmygal has said that about 50% of Ukraine's energy infrastructure had been damaged. Authorities have urged people to reduce their use of electricity and resorted to rolling blackouts.
Over the past months, air raid alerts have been sounded in Ukrainian regions every day, with many parts of the country experiencing power cuts.
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