Overnight, Russian missile and drone strikes have caused power cuts in extensive areas of the capital city, Kyiv.
Several individuals were wounded while residents in eastern districts were left without electricity and encountered problems to water supplies, according to local authorities.
At the same time, a seven-year-old child was killed in a distinct Russian drone strike in the Zaporizhzhia area in the southeastern part, based on information from local officials.
Moscow has increased strikes on electrical systems over recent weeks, while Ukrainian leadership has called for "concrete actions" from partner nations to apply pressure on Moscow.
"The necessity is not symbolic gestures but strong steps - from the United States, the EU and the G7 - in delivering air defence systems and applying penalties," he wrote in a public message.
He said that numerous aerial vehicles and more than 30 missiles attacked energy facilities, characterizing such attacks as "cynical and calculated" and against "critical infrastructure" as temperatures become colder.
Energy officials said Moscow was "launching a major assault" and maintenance teams were working to restore power.
A wave of strikes damaged electrical systems and apartment buildings in Kyiv.
Five out of the nine people wounded in the attacks on the capital have been transported for medical care, as confirmed by municipal representatives.
Regional authorities said the urban area endured intense attacks overnight. A minor lost their life and several individuals were injured.
The attacks succeed evenings of aerial attacks in the area, sections of which remain under the control of Russian forces.
All of Ukraine is in a state of readiness for sophisticated projectile assaults, which are harder to spot.
National leaders told journalists that Russia was deliberately attempting to damage the country's energy grid, with assaults already affecting fuel infrastructure.
He said technical personnel and officials were bracing for further attacks.
