said on Thursday that there was nothing unusual about a planned exercise involving practicing the deployment of tactical nuclear weapons in southern Russia along with ally Belarus. According to Russia, it would practice deploying tactical nuclear weapons as part of a military exercise after what Moscow said were threats from France, Britain and the United States. “There is nothing unusual here, this is planned work,” Putin said, according to state news agency TASS. “It is training.”, in its announcement on Monday, explicitly linked the nuclear exercise to “provocative statements and threats by certain Western officials against the Russian Federation”. Putin previously said that Moscow had transferred some tactical nuclear weapons to Belarus, which was Russia’s first move of such warheads outside Russia since the 1991 fall of the Soviet Union. Putin said that he had suggested to Belarus that it take part in one of the parts of the nuclear exercise announced on Monday. “We hold them regularly,” Putin said. “This time they are held in three stages. At the second stage, Belarusian colleagues will join our joint actions.” Belarusian President Alexander Lukashenko, speaking alongside Putin, said that this was the third such training exercise. “There were probably dozens in Russia, so we synchronized. And the general staffs, as the Russian defense minister told me, have already begun to execute these instructions,” Lukashenko said. Russia and the United States are by far the world’s biggest nuclear powers, holding more than 10,600 of the world’s 12,100 nuclear warheads. China has the third-largest nuclear arsenal, followed by France and Britain. Russia has about 1,558 non-strategic nuclear warheads, according to the Federation of American Scientists, though there is uncertainty about exact figures for such weapons due to a lack of transparency. There is still much uncertainty among arms controls experts about what weapons Russia has supplied to Belarus and the nature of their storage. Typically, it would take some time to create the storage, security and barracks for such a deployment – and Russian nuclear weapons are controlled by the Russian defense ministry’s 12th Main Directorate (known as 12th GUMO). It is unclear if 12th GUMO is in Belarus, according to Western experts. No power has used in war since the United States unleashed the first atomic bomb attacks on the Japanese cities of Hiroshima and Nagasaki in 1945. The Pentagon said on Monday that it had not seen a change to Russia’s disposition of its strategic nuclear forces, despite what it called “irresponsible rhetoric” from Moscow detailing plans for exercises involving the deployment of non-strategic nuclear weapons.