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

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

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.

An air-raid warning has been issued across Ukraine on the morning of 15 January due to the threat of missile strikes. Source: map of air-raid warnings; Ukraine's Air Force; monitoring Telegram channels Details: An air-raid warning was issued in all Ukrainian oblasts due to the threat of a missile strike.

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.