Thousands of migrants, most of them Syrian refugees, were marching through Macedonia and Serbia on Sunday in a bid to reach the EU after being stranded for days on the Greek border.
The mass movement came after Macedonia police on Saturday reopened the country's southern frontier, enabling thousands to travel north towards Serbia from which they seek to enter the European Union (EU).
The border was opened after dramatic scenes on Saturday in which hundreds of refugees forced their way through the barbed wire fences, many carrying small children, as police hurled stun grenades to try and stop them.
Macedonia had on Thursday declared a state of emergency and sealed off its southern border in a bid to halt the influx, leaving thousands stranded in no-man's land.
But on Saturday night, it lifted the restrictions.
By mid-Sunday, more than 6,000 refugees and migrants had crossed into Serbia where eight huge UN refugee agency tents were set up in the border village of Miratovac, providing food and shelter from the chilly weather, Amet Alimi, president of Presevo Red Cross, told AFP.
"We have worked all night to admit them. There is a flow of people who keep coming," he said.
People were visibly exhausted and many asked for medical aid. There were many children and pregnant women among them, an AFP photographer said.
They were then being bussed to the nearby town of Presevo where police handed out documents and helped them take buses to the border with Hungary, an EU member state.
In Gevgelija on Macedonia's southern border with Greece refugees and migrants keep coming in groups of few hundreds at a time.
