"Our servicemen, crews have fully completed their training in the joint combat training centres of the armed forces of the Russian Federation and the Republic of Belarus," Leonid Kasinsky, head of the Main Directorate of Ideology at the ministry, said in a video posted on the Telegram messaging app.It is not clear how many of the Iskander systems - which are capable of carrying nuclear weapons - have been deployed to Belarus after Russian President Vladimir Putin said in June that Moscow would supply Minsk with them and the air defence systems.Russian forces used Belarus as a launch pad for their abortive attack on the Ukrainian capital, Kyiv, in February, and there has been a growing flurry of Russian and Belarusian military activity in recent months.Its two guided missiles have a range of up to 500 km (300 miles) and can carry conventional or nuclear warheads.That range reaches deep into neighbours of Belarus: Ukraine and NATO member Poland, which has very strained relations with Minsk."