Russia fired 172 drones and 36 ballistic missiles at Kyiv and nearby regions overnight, leaving parts of the city without power, water and heating.
Strikes hit substations linking the Rivne and Khmelnytsky nuclear plants to Kyiv, cutting that power supply to the capital.
Substations in Vinnytsia, Zhytomyr, Rivne, Kharkiv and Dnipro were also hit. Twelve regions were struck in all.
Energy Minister Denys Shmyhal said power cuts were in place in five regions after the attack.
Mayor Vitali Klitschko said water was back to normal by Saturday. About 60 per cent of apartment buildings had heating again.
Five to six people were injured, including a 14-year-old girl. The Northern Bridge, known as Pivnichnyi, was closed for repairs.
President Volodymyr Zelenskyy said North Korean KN-23 missiles hit a key energy facility. Four of the 36 ballistic missiles were shot down.
Russia said its attack targeted energy and transport sites in Ukraine.
Kyiv had its worst water outage of the war on 3 and 4 November, when water was cut for more than 24 hours.
The attack came days before planned peace talks in Abu Dhabi aimed at ending the war.
Read the full report on the Kyiv blackouts on Trends News Stories.
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