Tensions between Russia and Nato, already stretched considerably by the invasion of Ukraine, have ratcheted up even further over Kaliningrad, a small piece of Russian territory sandwiched between Poland and Lithuania on the Baltic coast and cut off from mainland Russia.
Kaliningrad is a Russian oblast (region), of just under half a million people on the Baltic sea. It sits between Lithuania to its north and east and Poland to its south and is about 1,300km from Moscow. It was claimed by the Soviet Union from Germany after the second world war and has been controlled by Moscow ever since.
