Putin's chief propaganda reporter, Dmitry Kiselyov, claimed that Russia could use its new hypersonic Satan-2 missile to destroy the UK.
Kiselyov also claimed that Russia could use an underwater robotic drone called Poseidon to submerge the UK.
Boris Johnson, the former UK Prime Minister, claimed that Putin personally threatened him with a missile strike during a phone call.
The threat comes shortly after Ukraine's Western allies agreed to send military aid to the invaded nation, which Russia called "extremely dangerous."
Putin has been causing concern among world leaders with his newly deployed warship, the Admiral Gorshkov, being spotted off the coast of the UK, Norway, Belgium, and the United States.
The Admiral Gorshkov is reportedly outfitted with nuclear-capable Zircon missiles that have a speed of 6,670 MPH and a range of 625 miles. Putin's navy has been running missile tests with the Admiral Gorshkov and the Mach 9 Zircon missiles.