Overnight, Moscow's missile and drone strikes have resulted in blackouts in large parts of Ukraine's capital, Kyiv.
Nine people were wounded while local people in eastern districts were left without electricity and dealt with problems to water supplies, according to municipal leaders.
At the same time, a young boy was killed in a different assault in the southeastern region in the country's south-east, according to local officials.
Moscow has intensified attacks on power infrastructure over the past few days, while officials has requested "substantial measures" from international partners to apply pressure on Russia.
"What's needed is not symbolic gestures but strong steps - from the US, the EU and the Group of Seven - in supplying protection systems and enforcing penalties," was stated in a public message.
Officials stated that 450 drones and more than 30 missiles struck Ukraine's energy infrastructure, characterizing such attacks as "strategic and deliberate" and against "everything that sustains normal life" as winter approaches.
The energy minister said Russia was "launching a major assault" and maintenance teams were striving to fix the damage.
A barrage of missiles struck power facilities and apartment buildings in Kyiv.
Several of the people hurt in the strikes on the city have been taken to hospital, as confirmed by local officials.
Local officials said the metropolitan region came under significant strikes during nighttime hours. A minor was killed and three other people were hurt.
The assaults follow nights of air raids in the area, parts of which remain under the control of invading troops.
The entire country is on alert for advanced weapon attacks, which are more difficult to detect.
Authorities told journalists that Moscow was deliberately attempting to destroy the electrical infrastructure, with attacks already impacting fuel infrastructure.
Officials stated utility staff and government agencies were preparing for more assaults.
