"During the night, the enemy attacked the gas infrastructure. In the morning, the energy system continues to be the target", writes Ukrainian Energy Minister Herman Halusjtjenko on social media.
Explosions have been heard, among other things, in Poltava in central Ukraine, reports Ukrainian public service company Suspilne. The country's air force warns of rockets that have entered Ukraine from the north. Attack drones have also been detected and are being tracked in the airspace.
Emergency shutdowns of the power grid have been carried out in several regions due to the attack, according to state-owned Ukrenergo, which is responsible for the country's main grid.
"Rockets from Russia are a confirmation that Putin is only interested in war", writes Andrij Jermak, chief of staff to Ukraine's President Volodymyr Zelenskyj.
