Thousands of migrants enter Croatia and Hungary from Serbian territory before continuing their journey to the north of the European Union. This thematic series contains pictures of:Refugee Aid Center in Šid, Serbia;Migrants crossing the Serbian border into Opatovac, Croatia;Migrants trying to avoid being registered in a refugee camp as they cross the Croatian-Serbian border in Tovarnik;Migrants boarding trains at the Beli Manastir station near the Hungarian border, Croatia.