Russia's Deputy Prime Minister Yury Borisov said a new generation of secret laser weapons are being used in the war in Ukraine.
Speaking on Russian state television, Mr Borisov said prototype weapons capable of burning down drones and blinding satellites are already being used.
However, many are sceptical about Russia's claims, putting it down to psychological warfare and an attempt to scare the enemy.
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Russia claims the Peresvet laser weapon can burn down drones from three miles away in just five seconds, and blind satellites up to 1,500 km above the earth.
Ukraine's President Volodymyr Zelensky compared it to the last days of the Second World War, when with no chance of winning the war, Germany built on the success of its world-beating V-2 long-range rocket, ramping up its propaganda about something that did not exist.
Mr Zelensky said the move shows the complete failure of the Russian mission.
More evidence is needed from the battlefield before it can be confirmed whether this is merely psychological warfare, or a game changer for Russia in this war.