Overnight, Russian missile and drone strikes have caused blackouts in large parts of Ukraine's capital, Kyiv.
A number of civilians were hurt while inhabitants in eastern neighborhoods were plunged into darkness and faced disruption to water supplies, according to local authorities.
At the same time, a minor was lost their life in a separate aerial attack in the Zaporizhzhia area in the country's south-east, based on information from area administrators.
Moscow has increased attacks on power infrastructure over the last fortnight, while officials has demanded "real steps" from allies to exert influence on Moscow.
"What is required is not symbolic gestures but strong steps - from the US, European nations and the major economies - in delivering protection systems and enforcing restrictions," was stated in a public message.
Authorities reported that hundreds of unmanned aircraft and several dozen rockets targeted Ukraine's energy infrastructure, describing such strikes as "cynical and calculated" and against "essential services" as temperatures become colder.
The energy minister said Moscow was "launching a major assault" and repair crews were striving to restore power.
A series of attacks hit energy infrastructure and apartment buildings in the capital.
Several of the people wounded in the strikes on the capital have been hospitalized, as confirmed by local officials.
Local officials said the urban area experienced heavy assaults overnight. A young boy was killed and three other people were injured.
The strikes come after nights of aerial attacks in the territory, sections of which are occupied by Russian forces.
All of Ukraine is under warning for sophisticated projectile assaults, which are tougher to spot.
Government officials told reporters that Moscow was purposely seeking to damage the electrical infrastructure, with attacks already affecting gas facilities.
He said energy workers and officials were bracing for more assaults.
