Slovenia later suspended all train traffic between Slovenia and Croatia until Friday morning, Slovenian news agency STA reported.
A Hungarian police spokesman said the migrants were being taken to two Hungarian registration points in Szentgotthard and Vamosszabadi – both close to the Austrian border.
Croatia closed most of its border crossings with Serbia Thursday after the country was overwhelmed by a massive influx of refugees.
Health Minister Sinisa Varga said Croatia expects an influx of more than 20,000 migrants during the next two weeks.
Later on Thursday, Milanović also made clear that migrants that have already entered will be provided with food, water and medical help, “where necessary”, as the BBC quotes him as saying. “We don’t know how to answer this question, and I see that they are very nervous and very exhausted “. We have been travelling for ten days.
The United Nations’ top human rights official described the images from the Hungarian border as “truly shocking”.
German foreign minister Frank-Walter Steinmeier said in a newspaper interview that Germany, Austria, Sweden and Italy can not bear all the burden of migrants coming to Europe, but some countries, mostly in eastern Europe, have opposed consensus on the distribution of migrants according to pre-determined quotas.
Croatia, its newest member state, says it may have to use the army to stop illegal migrants criss-crossing the western Balkans in their quest for sanctuary in the 28-nation bloc.
Croatian authorities also sent dozens of buses carrying migrants to the border with Hungary.
Serbian officials, fearing the closure in Croatia would block thousands of migrants inside the country, protested Zagreb’s move.
“Up to now we have registered 13,000 migrants on Croatian territory”, Ranko Ostojic, Croatian interior ninister, said on Friday.
“We are calling on the European Union to realize that Croatia will not be a hot-spot”, he said.
While Croatia has attempted to take the newcomers to asylum centers, the overwhelming numbers mean that many people have been left on the streets.
Prime Minister Viktor Orban has said he is acting to save Europe’s “Christian values” by blocking the main overland route used by many Muslim refugees.
“We agreed on certain things”, Milanovic told a government session.
In Paris, French authorities evacuated more than 500 Syrian and other migrants from tent camps and moved them into special housing as the country steps up its efforts to deal with Europe’s migrant wave.
“I’m going to Croatia”.
Serbia would take Croatia to worldwide courts if the border crossings remained closed, he said.