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

Ukraine fired missiles and drones at factories and energy facilities across Russia early on Tuesday, sparking fires hundreds of kilometres (miles) from the frontline, a source in Ukraine's SBU security services said. The Russian military accused Kyiv of using US- and British-supplied missiles and promised the strikes would "not go unanswered".

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 forces used missiles and drones on Tuesday to target sensitive military and energy sites across Russia.

On the night of 13-14 January, the Ukrainian defence forces conducted a massive attack on the Russian military facilities at a distance of 200 to 1,100 km deep in Russia. Source: General Staff of the Armed Forces of Ukraine Details: Targets in Bryansk,