The Russian missiles sought out targets from the Lviv region in western Ukraine near Poland to Kharkiv in northeast Ukraine bordering Russia. The state energy company Ukrenergo reported emergency power outages in six regions. It often shuts down production during attacks as a precaution.

Russia's military on Tuesday said it would retaliate against Ukraine after Kyiv attacked Russian regions by firing six U.S.-made ATACMS ballistic missiles, six UK-made Storm Shadow cruise missiles and launching one of the biggest drone attacks to date.

Ukraine launched the "most massive" attack on Russia since Russian President Vladimir Putin invaded Ukraine three years ago. Russia retaliated by striking vital energy facilities in Ukraine, an age-old tactic in the punishing winter months,

Russia launched a major ballistic and cruise missile attack on regions across Ukraine early Wednesday, targeting energy production and compelling authorities to shut down the power grid in some areas,

Ukraine fired six British Storm Shadows and six US-made ATACMS ballistic missiles during its largest aerial bombardment of Russia in the war so far, Ukrainian and Russian officials have said.

Ukrainian air defence and mobile drone hunter groups shot down 58 out of 80 drones launched by Russia in overnight attacks on Tuesday, the air force said in a statement.

A massive Russian attack on Ukraine is underway. The Operational Command of the Armed Forces announced that standby pairs of fighter jets have been scrambled, and ground air defence and radar systems have reached the highest state of readiness.