Austrian border barrier
The Austrian government invited Bulgaria for participation at an extraordinary meeting between the interior and foreign ministers of the countries along the Western Balkans migrant route.
The invitation was sent by Austria's Interior Minister Johanna Mikl-Leitner and Foreign Minister Sebastian Kurz.
Austria on Friday morning began enforcing restrictions on the number of migrants that can enter the country each day.
Austrian Interior Minister Johanna Mikl-Leitner previously announced that a maximum of 80 asylum requests will be accepted daily from those arriving via the Balkan route, while 3,200 refugees will be allowed to enter each day.
Austria said it would send back refugees who enter the country from the Croatia and Slovenia, pointing out that "Europe needs a sustainable asylum system."
Minister of Internal Affairs of Austria Johanna Mikl-Leitner said that Croatia and Slovenia are "safe countries" and that migrants who pass through them without seeking asylum will be returned there.