FILE PHOTO: Soldiers build razor wire fence on Poland's border with Russia's exclave of Kaliningrad near Bolcie, Poland November 3, 2022. Arkadiusz Stankiewicz/Agencja Wyborcza.pl via REUTERS
(Reuters) - 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 bilateral ties continue to fray over the war in Ukraine.
Kaliningrad 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 Soviet politician Mikhail Kalinin.
