Overnight, Russian missile and drone strikes have caused power cuts in large parts of Ukraine's capital, Kyiv.
Nine people were hurt while residents in the city's east were left without electricity and dealt with interruptions to drinking water, per reports from local authorities.
Meanwhile, a minor was killed in a distinct Russian drone strike in the southeastern region in the country's south-east, as reported by regional authorities.
Russian forces has intensified strikes on energy facilities over recent weeks, while Ukrainian leadership has called for "real steps" from allies to exert influence on Russia.
"What is required is not symbolic gestures but decisive action - from the United States, the EU and the Group of Seven - in supplying air defence systems and applying penalties," was stated in a online statement.
Authorities reported that hundreds of unmanned aircraft and several dozen rockets attacked Ukraine's energy infrastructure, describing such attacks as "cynical and calculated" and against "everything that sustains normal life" as temperatures become colder.
Government representatives said Moscow was "inflicting a massive strike" and technical staff were working to fix the damage.
A wave of strikes hit energy infrastructure and residential structures in Kyiv.
Several of the people injured in the strikes on the city have been hospitalized, as confirmed by municipal representatives.
Area administrators said the city endured significant strikes overnight. A seven-year-old child was killed and multiple civilians were hurt.
The assaults follow periods of air raids in the region, sections of which remain under the control of Moscow's military.
The whole nation is under warning for advanced weapon attacks, which are harder to spot.
National leaders told journalists that Russia was intentionally trying to damage the country's energy grid, with attacks already affecting fuel infrastructure.
Authorities confirmed energy workers and government agencies were bracing for additional strikes.