Russia never meddles in internal affairs of its neighbours, or more generally any other country.
“The fighters for the renewal of Belarus” take part in trainings in Poland, Georgia, Ukraine and the Baltic States – these trainings are realised with the participation of instructors from the CIA, Pentagon and the American NGOs associated with the US Department of State.
This is a pro-Kremlin narrative about Western attempts to organise a colour revolution in Belarus. The USA and its European “vassals” (Poland, Ukraine, Baltic states) have been repeatedly accused by the pro-Kremlin media in alleged attempts to overthrow Alyaksandr Lukashenka using all possible means. There is no evidence proving the claim that the CIA and Pentagon instructors prepare the Belarusian “fighters” in Poland, Georgia, Ukraine and the Baltic States – this statement should be perceived as a conspiracy theory. See other examples of similar messages: The West supports a bloody post-election Maidan scenario in Belarus; The West wants to prepare Maidan in Belarus and Poland presented a plan of active interference in the domestic affairs of Belarus.