Groups of frustrated migrants, including families with small children, walked along north-bound Greek highways Thursday hoping to reach Macedonia after authorities stopped their buses to ease a bottleneck on the practically blocked border, according to AP. It was yet another sign of Europe's failure to address its worst immigration crisis since the end of World War II. As some 2,000 migrants per day cross illegally into Greece on their way to a better life in the continent's wealthier north, restrictions imposed by Austria and Balkan nations have left thousands trapped in the financially broken country, which has seen nearly a million arrivals since January 2015. The Greek government underlined its annoyance Thursday by recalling its ambassador to Austria for consultations "in order to safeguard friendly relations" between the two states, said Foreign Minister Nikos Kotzias. Greece does not detain people entering the country illegally if they are from Syria, Iraq and several other countries whose citizens are considered eligible for asylum. Defense Minister Panos Kammenos said about 20,000 migrants are stuck in the country, and pledged to set up new camps near the Macedonian border within the next 10 days that could host them all in "decent" conditions.