The latest developments as European governments struggle to cope with the huge number of people moving across Europe. All times local:

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8:55 a.m.

Serbia has banned imports of Croatian goods and Croatia has retaliated by barring Serbian nationals from entering the country as relations between the two Balkan neighbors deteriorated over the influx of migrants over their border.

Serbia had given Croatia an ultimatum to reopen its border for all cargo transport by midnight, which Croatia has been blocking since last week.

Croatia shut all but one of its crossings with Serbia to block the migrant surge, which reached nearly 45,000 in a week. Croatia is angry that Serbia is busing migrants to its border, rather than sending them north to Hungary.

Croatia's action has crippled the economy in Serbia, a conduit for cargo across Croatia to western and central Europe.

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8:40 a.m.

Romania's president says his country will give 300,000 euros ($336,000) in the next three years to the World Food Program to help relief agencies offer food and shelter to people fleeing conflicts.

President Klaus Iohannis spoke early Thursday after an emergency European Union summit to discuss ways of tackling the migration crisis. At the meeting leaders agreed to give an extra 1 billion euros ($1.1 billion) to the United Nations refugee agency and World Food program to help refugees.

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