Throughout the evening, Moscow's missile and drone strikes have led to power cuts in multiple districts of Ukraine's capital, Kyiv.
A number of civilians were hurt while local people in eastern districts were left without electricity and dealt with interruptions to drinking water, according to municipal leaders.
Meanwhile, a young boy was fatally injured in a different assault in the Zaporizhzhia region in the southern area, according to area administrators.
Russian forces has escalated strikes on power infrastructure over the last fortnight, while the country's government has called for "real steps" from international partners to apply pressure on Russia.
"What is required is not symbolic gestures but firm measures - from the US, Europe and the Group of Seven - in supplying air defence systems and implementing restrictions," he wrote in a online statement.
He said that hundreds of unmanned aircraft and several dozen rockets targeted the country's power systems, characterizing such attacks as "strategic and deliberate" and against "everything that sustains normal life" as temperatures become colder.
Government representatives said Russia was "launching a major assault" and technical staff were laboring to restore power.
A barrage of missiles damaged power facilities and residential structures in the capital.
Five out of the nine people wounded in the strikes on the city have been transported for medical care, according to local officials.
Area administrators said the metropolitan region experienced intense attacks overnight. A seven-year-old child died and three other people were injured.
The strikes follow nights of air raids in the area, portions of which are occupied by Russian forces.
The entire country is on alert for hypersonic Kinzhal missile strikes, which are more difficult to identify.
Government officials told reporters that Moscow was deliberately attempting to demolish the national power system, with assaults already impacting fuel infrastructure.
He said utility staff and government agencies were preparing for more assaults.
