A spokesperson for Russia's defence ministry has said that Moscow has destroyed an underground depot in western Ukraine using hypersonic missiles.
Igor Konashenkov claimed that the warehouse had been housing missiles and "aviation ammunition of Ukrainian troops".
Russia has never before admitted to using hypersonic missiles in combat.
They are cutting edge ballistic missiles that can fly in the upper atmosphere at more than five times the speed of sound.
According to the Russian military, the "Kinzhal" missile system used in the strike is capable of hitting targets at a range of more than 2,000km (1,242 miles) and can overcome all existing air and missile defence systems.
Source: BBC