Ukraine says power and water supply across the country has 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”.
The strikes come after Russia blamed Ukraine for a drone attack on its Black Sea Fleet in the annexed Crimea.
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