TOPSHOTS Migrants coming from Afghanistan sleep on a train heading north from Nis to Belgrade, early on July 18, 2015. Illegal immigrants cross Serbia on their way to other European countries as it has land access to four members of the 28-nation bloc -- Hungary, Bulgaria, Romania and Croatia. Over the last two years, Hungary has been one of the main routes for people hoping to cross into Austria and Germany, most coming from Afghanistan, Iraq, Syria and African countries. AFP PHOTO / DIMITAR DILKOFF