During the night, Moscow's missile and drone strikes have resulted in power cuts in large parts of Ukraine's capital, Kyiv.
A number of civilians were injured while inhabitants in eastern districts were experienced blackouts and faced disruption to water supplies, according to municipal leaders.
Simultaneously, a young boy was killed in a separate assault in the Zaporizhzhia region in the southern area, based on information from regional authorities.
Moscow has intensified assaults on electrical systems over recent weeks, while officials has called for "real steps" from allies to increase pressure on Moscow.
"What's needed is not window dressing but firm measures - from the United States, the EU and the G7 - in delivering air defence systems and applying penalties," was stated in a online statement.
He said that 450 drones and several dozen rockets attacked the country's power systems, characterizing such assaults as "cynical and calculated" and against "critical infrastructure" as the weather cools.
Energy officials said Moscow was "launching a major assault" and technical staff were striving to repair systems.
A barrage of missiles struck electrical systems and apartment buildings in Kyiv.
Several of the people wounded in the assaults on the capital have been hospitalized, per statements from local officials.
Regional authorities said the urban area endured significant strikes overnight. A young boy died and several individuals were injured.
The attacks succeed periods of aerial attacks in the area, sections of which are occupied by invading troops.
All of Ukraine is under warning for advanced weapon attacks, which are more difficult to spot.
Authorities told reporters that Russia was purposely seeking to destroy the national power system, with attacks already impacting fuel infrastructure.
He said energy workers and authorities were preparing for further attacks.
