At least 6,500 refugees and migrants flooded across the Hungarian border into Austria, where many were greeted by charity workers offering beds, hot tea and welcome handshakes on Saturday.
Austrian officials told NBC News they expected 10,000 or more by the end of the day.
Waiting Austrians held signs that read, “Refugees welcome.” Many of the arrivals collapsed on the floor, smiles on their faces.
“Austria is very good,” 23-year-old Iraqi Merhan Harshiri told The Associated Press. He smiled broadly as he walked toward the supply line, where newcomers munched apples and bananas. “We have been treated very well by Austrian police,” he added.
#RedCross in #Austria (@roteskreuzat) is prepared for the arrival of #refugees from Hungary, but it will be a long night #ProtectHumanity
— Stephen Ryan (@stiofanoriain) September 4, 2015
The breakthrough came after days of confrontation and chaos, with Hungary’s right-wing government deploying dozens of buses to take migrants from Budapest.
Some 3,500 had already arrived in Vienna, Austria’s capital, by around 2 p.m. (8 a.m. ET), according to the Interior Ministry.
Those who wanted to continue towards the Austrian capital Vienna and then Germany, which has been seen as among the most welcoming countries to refugees and migrants, would be allowed to go, police told NBC News early.
Photos: Tired of waiting, migrants and refugees set off on 300-mile trek
For days, several thousand refugees and migrants camped outside Budapest’s main railway station, where trains to western Europe were canceled as the government insisted all those entering Hungary be registered and their asylum applications processed in the country as per European Union rules.
But on Friday, in separate, quick-fire developments, hundreds broke out of an overcrowded camp on Hungary’s border with Serbia, escaped from a stranded train, and took to the highway by foot led by a one-legged Syrian refugee and chanting “Germany, Germany!”
Austria said it had agreed with Germany that it would allow the migrants access,waiving the rules of an asylum system brought to breaking point by Europe’s worst refugee crisis since the Yugoslav wars of the 1990s.








