Thousands of migrants throng Austria over the weekend ahead of a unified EU response to the crisis.
Austrian authorities are expecting more arrivals from Hungary on Monday.
Foreign Ministers from four eastern European countries are due to hold talks on the crisis later, kicking off a week of intense diplomatic activity.
EU Interior Ministers are also to meet on Tuesday, with leaders convening for an extraordinary summit the following day.
The crisis has exposed deep divisions among European states.
French President, François Hollande, has said “no-one can be exempt” from taking in people with the right to asylum, while European Council President, Donald Tusk, said that the EU should help Syrian refugees to “a better life closer to their homes”.
But at the meeting due later on Monday, the Foreign Ministers from Hungary, Poland, Slovakia and the Czech Republic are expected to reaffirm their opposition to Germany’s call for a more even distribution of migrants.
