Former Russian President Dmitry Medvedev, now deputy chairman of Russia’s Security Council, made the comments in an 8,000-word article on Russian-Polish relations, saying Moscow now had a “dangerous enemy” in Poland.

Poland, which has backed Ukraine, accuses Russia of trying to destabilise the country with disinformation campaigns and espionage. Moscow has condemned what it sees as Warsaw’s hostile stance towards it and Russian interests in Poland.

There was no immediate response to Medvedev’s comments from Poland.