Ukraine went through the winter with its own gas, head of the board of NJSC Naftogaz Ukrainy Oleksiy Chernyshov said on his Facebook page.

"A historical event. Ten years ago no one would have believed this. Two years ago, when a full-scale war began, it was also difficult to believe. But we did it and plan to maintain the trend of Ukraine's energy independence further," he wrote.

"I am proud and grateful to the Ukrainian gas workers who made this possible," the Naftogaz head said.