Overnight, Russian missile and drone strikes have caused electricity outages in extensive areas of Ukraine's capital, Kyiv.
Several individuals were injured while local people in the city's east were plunged into darkness and encountered disruption to water systems, according to municipal leaders.
Meanwhile, a young boy was fatally injured in a distinct Russian drone strike in the Zaporizhzhia region in the southeastern part, as reported by area administrators.
Russian forces has intensified attacks on power infrastructure over recent weeks, while the country's government has called for "substantial measures" from allies to apply pressure on Russia.
"What's needed is not symbolic gestures but strong steps - from the America, the EU and the Group of Seven - in supplying defensive weapons and applying restrictions," he wrote in a public message.
Authorities reported that hundreds of unmanned aircraft and several dozen missiles attacked Ukraine's energy infrastructure, characterizing such attacks as "premeditated" and against "critical infrastructure" as temperatures become colder.
Government representatives said Russia was "launching a major assault" and technical staff were laboring to repair systems.
A barrage of missiles damaged energy infrastructure and civilian homes in Kyiv.
Several of the people hurt in the strikes on the city have been transported for medical care, as confirmed by local officials.
Area administrators said the city came under heavy assaults throughout the evening. A seven-year-old child lost their life and several individuals were injured.
The strikes follow evenings of bombing campaigns in the territory, parts of which remain under the control of Russian forces.
All of Ukraine is under warning for hypersonic Kinzhal missile strikes, which are harder to detect.
National leaders told the media that Moscow was deliberately attempting to damage the electrical infrastructure, with assaults already disrupting fuel infrastructure.
Officials stated utility staff and authorities were preparing for further attacks.