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Migrants break through Croatian police lines at Tovarnik Migrants break through Croatian police lines at Tovarnik
(about 1 hour later)
Amid chaotic scenes in Croatia, crowds of migrants briefly broke through riot police lines at the border with Serbia.Amid chaotic scenes in Croatia, crowds of migrants briefly broke through riot police lines at the border with Serbia.
People waiting for hours in blazing heat at Tavornik grew frustrated, though the situation is quieter now. People waiting for hours in blazing heat at Tovarnik grew frustrated, though the situation is quieter now.
Croatia is struggling to deal with at least 7,300 arrivals since Wednesday morning after Hungary closed its border with Serbia, blocking the previous route into the European Union.Croatia is struggling to deal with at least 7,300 arrivals since Wednesday morning after Hungary closed its border with Serbia, blocking the previous route into the European Union.
EU leaders will hold an emergency summit next week to discuss the crisis.EU leaders will hold an emergency summit next week to discuss the crisis.
Croatian officials say migrants must apply for asylum there or be treated as illegal immigrants.Croatian officials say migrants must apply for asylum there or be treated as illegal immigrants.
The BBC's Fergal Keane, in Tavornik, said the trouble began when people began pushing at police to get through. Authorities seem to be overwhelmed and surprised by the number of migrants - most of whom wish to travel on to other EU countries - and the Croatian interior minister has said the country is "absolutely full".
Riot police were trying to hold back several thousand migrants who had crossed from Serbia. Correspondents described the scenes in Tovarnik as mayhem, after several thousand migrants who had crossed from Serbia were held back by riot police, trying to get them to wait for transport on from the border.
There was mayhem as Croatian police tried to restore order, with children screaming, women crying and people knocked over, our correspondent adds. Croatian police eventually gave way under pressure. Some of the migrants said they intended to walk to Slovenia.
The crowds, who were chanting "we want to go", had gathered in the baking heat to wait for transport on from the border. Many are exhausted with supplies of food and water running low.
Croatian police eventually gave way under pressure. Many of the migrants said they intended to walk to Slovenia. At the scene: Fergal Keane in Tovarnik
Many of the migrants are exhausted with supplies of food and water running low. All morning several thousand people had waited in the heat hoping a train would take them north on their long journey to Germany.
Croatia is part of the European Union but is not part of the borderless Schengen area. Around midday we saw a group of young men begin to mobilise for a protest.
The interior minister said Croatia would not be able to take any more migrants. At first they tried to walk towards Zagreb on the rail line but were turned back by the police. They then walked to the police line on the road next to the station. For about an hour they chanted "let us go" and pressed the police to be allowed through.
Eventually police allowed some women and children to squeeze past their line.
Scenes of chaos followed. Men tried to push through. Children became separated from parents.
The police did not resort to force. There was no use of batons or teargas. They attempted to push the crowd back but could not prevent a breach.
I saw hundreds pushing through a wire fence and running towards the main road. On the way a man suffered a heart attack.
A combination of angry young men, extraordinary numbers of people and a lack of any coherent plan by the EU has produced scenes of chaos in Europe.
Follow Fergal Keane on Twitter.
Croatia's president has asked the army to be ready to protect its borders from "the illegal migration", state news agency Hina reported.
Hungarian media reported that dozens of migrants were crossing from Croatia into Hungary at Illocska - thus avoiding the fence on Hungary's border with Serbia.
Croatia said it would allow migrants to travel into northern Europe, but officials in Slovenia - which borders Croatia to the north - have said they would tighten their border security and would stick to rules which require asylum-seekers to register on arrival.
Slovenia, like Hungary, is an entry point to the Schengen zone, which normally allows people to travel between member countries without restrictions.
On Wednesday, hundreds were involved in clashes at the Hungary-Serbia border after Hungarian authorities used water cannon and tear gas to stop migrants forcing their way through.On Wednesday, hundreds were involved in clashes at the Hungary-Serbia border after Hungarian authorities used water cannon and tear gas to stop migrants forcing their way through.
Separately on Thursday, European Council President Donald Tusk announced that European leaders would meet on 23 September. The United Nations' top human rights official said the images from the border were "truly shocking".
The European Parliament voted to back plans for the mandatory relocation of 120,000 refugees around the EU, but interior ministers from EU countries have not so far been able to reach agreement on the plan. Zeid Raad al-Hussein said he was appalled at Hungarian authorities' actions, some of which "amount to clear violations of international law".
Read more coverage of the migrant crisisRead more coverage of the migrant crisis
Follow BBC correspondents on Twitter covering the crisisFollow BBC correspondents on Twitter covering the crisis
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Croatia said it would allow migrants to travel into northern Europe, but officials in Slovenia - which borders Croatia to the north - have said they would tighten their border security and would stick to rules which require asylum-seekers to register on arrival. Separately on Thursday, European Council President Donald Tusk announced that European leaders would meet on 23 September.
Slovenia, like Hungary, is an entry point to the Schengen zone, which normally allows people to travel between member countries without restrictions. The European Parliament voted to back plans for the mandatory relocation of 120,000 refugees around the EU, but interior ministers from EU countries have not so far been able to reach agreement on the plan.
In other developments:In other developments: