Multiple regions of Ukraine, including its capital Kyiv, faced a new "massive" Russian missile attack on Thursday.
Air raid sirens rang out across the country for five hours -- one of the longest alarms of the war.
Ukraine's military said it had shot down 54 missiles out of 69 launched in the assault, including 16 around Kyiv where three people were reported injured and 40% of residents were without power.
Damage was also reported at an electricity station in Kharkiv, Ukraine's second-largest city, and in the southern regions of Zaporizhzhia and Odesa.
Meanwhile, the mayor of Lviv said on Telegram that 90% of his city near the Polish border had been left without electricity.
Ukraine's Foreign Minister Dmytro Kuleba described the attack as "senseless barbarism".
Waves of weekly Russian air strikes in recent months have targeted Ukraine's energy infrastructure, leaving millions without power and heating in often freezing temperatures.
"Ukrainian air defense forces demonstrated an incredible level of skill and efficiency," Prime Minister Denys Shmyhal said on Telegram.
"In some areas, emergency shutdowns may be applied to avoid accidents in the networks. Our power engineers are already working to repair everything," he added.
According to the Ukrainian deputy head of the president’s office, two people were killed in Russian strikes on Wednesday.
Moscow has repeatedly denied targeting civilians and says its missile strikes on infrastructure are militarily legitimate.
Russian President Vladimir Putin oversaw the commissioning of new warships and vowed on Thursday to further strengthen his country's navy.
“We will speed up and increase the volumes of construction of ships of various projects, equip them with the most modern weapons, and
Read more on euronews.com