Migrants and refugees cross the Croatian-Slovenian border Migrants and refugees illegally travel across the Croatian-Slovenian border on October 20, 2015 in Kljuc Brdovecki, Croatia. Tensions have built along the migrant trail after Hungary shut key borders with Serbia and Croatia to migrants with razor wire -- pushing the flow west to Slovenia, which in turn has also limited arrivals, along with Croatia. The moves have left thousands of people stranded in wet and freezing weather at Croatia's frontier with Serbia, after they travelled up through Greece and Macedonia. IMAGES