Ukraine says power and water supplies across the country have been badly hit after Russia launched more than 50 missiles targeting critical facilities.
In the capital Kyiv, 80% of residents were without water, and about 350,000 apartments had no electricity, Mayor Vitaliy Klitschko said.
In the north-eastern city of Kharkiv, energy facilities were struck.
Russia said its long-range high-precision weaponry targeted Ukraine’s military command and energy systems.
The country’s defence ministry added that all “designated objects were hit”.
Ukraine’s military said its air defences had shot down 44 out of 50 cruise missiles launched from the area of Russia’s Rostov region and the Caspian Sea.
Thirteen people were injured in the attacks across the country, the Ukrainian police chief said on national television.
The strikes come after Russia blamed Ukraine for a drone attack on its Black Sea Fleet in the annexed Crimea.
Mr Klitschko reported water shortages in Kyiv after an energy facility near the city was damaged in the Russian attack. He said the supply would be partially restored within three to four hours.
He also said that engineers were urgently deployed to restore electricity supply.
The city authorities said that in Kyiv itself “no hits were recorded” due to “the effective work of the air defence forces”.
Missile strikes were also reported on Monday morning in the central Vinnytsia region, as well as Dnipropetrovsk and Zaporizhzhia in the south-east, and Lviv in western Ukraine.
A facility at the Dnipro hydroelectric power plant in the Zaporizhzhia region was also reportedly hit.
Overall, 18 facilities – most of them energy-generating – were hit in 10 regions of Ukraine, Prime Minister Denys Shmyhal said, adding that “hundreds of localities in seven regions” were left without power.