Throughout the evening, Russian missile and drone strikes have resulted in blackouts in large parts of Ukraine's capital, Kyiv.
Nine people were wounded while residents in the city's east were left without electricity and encountered disruption to water supplies, according to city officials.
Simultaneously, a minor was killed in a different aerial attack in the Zaporizhzhia region in the country's south-east, based on information from regional authorities.
Moscow has escalated assaults on power infrastructure over recent weeks, while the country's government has called for "real steps" from allies to exert influence on Russia.
"The necessity is not window dressing but decisive action - from the United States, European nations and the G7 - in supplying protection systems and implementing restrictions," mentioned in a online statement.
Authorities reported that hundreds of unmanned aircraft and several dozen projectiles attacked the country's power systems, describing such assaults as "cynical and calculated" and against "critical infrastructure" as the weather cools.
Government representatives said Russia was "inflicting a massive strike" and technical staff were striving to fix the damage.
A wave of strikes damaged power facilities and residential structures in the capital.
Five out of the nine people injured in the strikes on the city have been hospitalized, per statements from city authorities.
Local officials said the urban area came under intense attacks throughout the evening. A minor was killed and multiple civilians were hurt.
The strikes follow periods of air raids in the area, portions of which are occupied by invading troops.
The entire country is under warning for hypersonic Kinzhal missile strikes, which are harder to spot.
Government officials told journalists that Russia was intentionally trying to destroy the national power system, with assaults already impacting energy systems.
He said energy workers and authorities were anticipating additional strikes.