ZAGREB - Some 4,000 migrants have entered Croatia from Serbia in the past 24 hours after Hungary sealed its border, national state-run HRT television reported on Thursday.
New migrants were continuing to enter the European Union (EU) member on its eastern border, which became their new route on the journey to western Europe, the Croatian channel reported.
A special train transporting some 800 migrants from Tovarnik, near the Serbian border, arrived in Dugo Selo, near Zagreb, around 0330 GMT, an AFP photographer reported.
The migrants were being transferred to a reception centre in nearby Jezevo.
Croatian Foreign Minister Vesna Pusic said late Wednesday that the country was prepared for the arrival of migrants but could not cope if the numbers increased dramatically.
"We are ready to (provide) asylum to a few thousand people and we can handle that, but we are not ready for tens of thousands," Pusic told HRT.
"We do not have capacities" for such an influx, she added.
Croatian Prime Minister Zoran Milanovic was to hold talks in Zagreb later Thursday with his Austrian counterpart, Chancellor Werner Faymann. Faymann would then travel to Ljubljana to meet Slovenian premier Miro Cerar, his office said.
Milanovic had vowed that his country would allow free passage of migrants across its territory.
A crisis meeting of the country's top security body, the National Security Council, was to be held on Friday.
The former Yugoslav republic has some 6,000 border police deployed.
Since the start of the crisis the Croatian authorities have urged solidarity with migrants, recalling its own role in accommodating hundreds of thousands of refugees and displaced people during the 1990s Balkans wars.