Ukraine said it came under a massive Russian missile attack on Wednesday morning that forced emergency power cuts across large swathes of the country.

Ukraine introduced emergency power cuts in six regions amid what authorities described as a "massive" Russian missile strike, the national grid operator said on Wednesday.

The scale of the assault on Wednesday was not immediately clear, but Ukraine’s energy minister called it “massive.”

Ukraine is under a massive raid red alert early on Wednesday amid reports of a large-scale attack launched by Russia. Air raid alerts indicate that there is a potential threat of an attack. The alerts may be issued when Russian warplanes take off,

Ukraine fired six US-made ATACMS ballistic missiles, six British Storm Shadow cruise missiles and at least 146 drones into Russia in a mass attack, says Moscow. It threatened retaliation against the air strikes.

Ukraine struck Russian regions with a major drone and missile attack overnight, damaging at least two factories and forcing schools to close in a major southern Russian city, according to Russian officials and media.

Ukraine used six British Storm Shadow missiles and US-made Atacms tactical ballistic missiles in what Kyiv described as its “largest attack” on Russian military facilities.

The barrage appeared to be one of the largest recent assaults in Ukraine’s campaign to damage Russia’s war machine on its home territory.