A group of a hundred soldiers from the Russian Wagner group have moved closer to the Belarusian city of Grodno near the Polish border, Polish Prime Minister Mateusz Morawiecki said on Saturday.

Poland, a former Warsaw Pact member which has been a full member of the U.S.-led NATO military alliance since 1999, has been concerned about the possible spillover of war on to its territory ever since Russian invaded Ukraine in February 2022.