During the night, Moscow's missile and drone strikes have led to blackouts in extensive areas of Ukraine's capital, Kyiv.
A number of civilians were hurt while residents in eastern districts were plunged into darkness and faced interruptions to drinking water, according to city officials.
At the same time, a minor was killed in a different aerial attack in the Zaporizhzhia area in the country's south-east, according to regional authorities.
Moscow has escalated attacks on electrical systems over the last fortnight, while the country's government has demanded "concrete actions" from international partners to exert influence on Russia.
"What's needed is not window dressing but firm measures - from the America, Europe and the major economies - in delivering defensive weapons and implementing penalties," he wrote in a public message.
He said that hundreds of unmanned aircraft and more than 30 rockets struck energy facilities, describing such attacks as "cynical and calculated" and against "everything that sustains normal life" as temperatures become colder.
Energy officials said Russia was "inflicting a massive strike" and maintenance teams were striving to restore power.
A wave of strikes damaged electrical systems and residential structures in Kyiv.
Five out of the nine people wounded in the assaults on the city have been transported for medical care, as confirmed by local officials.
Local officials said the urban area endured heavy assaults overnight. A seven-year-old child died and three other people were hurt.
The attacks succeed evenings of bombing campaigns in the area, parts of which are occupied by Russian forces.
The whole nation is in a state of readiness for advanced weapon attacks, which are tougher to spot.
Government officials told the media that Moscow was intentionally trying to destroy the electrical infrastructure, with strikes already affecting gas facilities.
Officials stated energy workers and government agencies were bracing for additional strikes.
