The 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\rbrNow Croatian riot police are sent to deal with migrants after 9000 arrive in the country, as Hungary faces condemnation for using tear gas to disperse crowds at .\rbr\rbrHundreds of refugees arrived by train to the Croatian town of Cakovec on Saturday, before coaches transported them to the Slovenian border. Video ID: .\rbr\rbrHungary will close its border with Slovenia after barring its three major crossing points on its Croatian border, ending the possibility for refugees to use these .