Croatia has announced an unprecedented spike in the arrival of migrants on a long, dangerous journey towards western Europe as the continent's worst post-World War II refugee crisis showed no sign of abating.
With many of the people fleeing war and misery flocking towards Germany, a new poll showed Chancellor Angela Merkel's popularity at home has been hit by her policy of openness.
Merkel's "strong commitment to the refugees has obviously not been met with much backing," the Der Spiegel weekly newspaper said on the poll published on Saturday (local time) on its pages.
Germany is expecting up to a million refugees and migrants to enter its borders this year, many encouraged by Merkel's welcoming stance.
Some 500,000 people have come to Europe so far this year, the International Organisation for Migration says, many of them taking perilous journeys on inflatable dinghies to Greece from Turkey, and then up towards western Europe through the Balkans and Hungary.
EU member Croatia became a key transit country when Hungary sealed its border with Serbia earlier this month in a bid to keep the migrants out.
In the past 10 days alone 65,000 refugees and migrants have arrived in the Balkan country, the interior ministry said on Saturday.
Most were given temporary shelter in a recently-built refugee reception centre in the village of Opatovac near the Serbian border. They were then taken on buses and trains to three border crossings with Hungary.
"The key is that everything goes smoothly on Hungary's side. [Hungary] is still receiving [the migrants] and transporting" them on towards the Austrian border, Interior Minister Ranko Ostojic told reporters.
However with hardline Hungary planning to seal the border with Croatia too, there is speculation that people might carve out a new so-called southern route through Montenegro.
Merkel, with her popularity down over her handling of the crisis, on Saturday sought to bring back the spirit of the country's reunification in 1990, to help face today's challenge of integrating the refugees.
She said integrating people will require a similarly important effort from the whole of German society.
"That general feeling - when we are faced with a major task that we can achieve - that, I believe, we can absolutely remember how to do," Merkel said in her weekly podcast.
Resistance to welcoming migrants remains strong in hardline states, with the Bulgarian Orthodox Church on Saturday calling on the Government not to let any more Muslim refugees into the country to prevent an "invasion".