Overnight, Moscow's missile and drone strikes have resulted in power cuts in large parts of the capital city, Kyiv.
Several individuals were wounded while local people in eastern districts were plunged into darkness and faced interruptions to water supplies, according to municipal leaders.
Meanwhile, a young boy was killed in a separate assault in the Zaporizhzhia region in the country's south-east, based on information from area administrators.
Moscow has intensified strikes on power infrastructure over the last fortnight, while Ukrainian leadership has called for "concrete actions" from allies to apply pressure on Moscow.
"The necessity is not window dressing but strong steps - from the US, the EU and the Group of Seven - in supplying protection systems and enforcing sanctions," mentioned in a public message.
He said that 450 drones and over thirty projectiles struck energy facilities, characterizing such attacks as "cynical and calculated" and against "critical infrastructure" as the weather cools.
Government representatives said Moscow was "inflicting a massive strike" and repair crews were striving to restore power.
A series of attacks damaged power facilities and residential structures in the capital.
Multiple people hurt in the strikes on the capital have been hospitalized, according to city authorities.
Area administrators said the urban area experienced intense attacks overnight. A seven-year-old child died and three other people were hurt.
The assaults follow nights of aerial attacks in the territory, portions of which remain under the control of invading troops.
The entire country is in a state of readiness for sophisticated projectile assaults, which are tougher to detect.
National leaders told journalists that Moscow was purposely seeking to damage the electrical infrastructure, with attacks already affecting fuel infrastructure.
Authorities confirmed utility staff and government agencies were anticipating additional strikes.
