The Kremlin said on Wednesday that Poland's decision to rename the Russian city of Kaliningrad in its official documents was a "hostile act", as ties continue to fray over the Ukraine war.
Kaliningrad, which sits in an exclave that is sandwiched between Lithuania and Poland on the Baltic coast, was known by the German name of Koenigsberg until after World War II, when it was annexed by the Soviet Union and renamed to honour politician Mikhail Kalinin.
