A train carrying around 1800 migrants leaves Croatia to travel to Slovenia after Hungary closed its borders overnight. Report by Cara Legg.\rbr\rbrA final group of migrants makes it into Hungary as soldiers close its southern border with Croatia to stop the inward flow. Paul Chapman reports. Subscribe: .\rbr\rbrThe UN refugee agency urges Croatia to keep its borders open to migrants, as Slovenia orders army to help maintain order, after Hungary seals its borders.\rbr\rbrPolice said the first bus full of migrants arrived at a Slovenian border crossing with Croatia on Saturday, after Hungary shut its border with Croatia late on Friday, .