In northern Greece, riot police were removing hundreds of protesting migrants from a border crossing into Macedonia, which is denying them entry.
Greek coast guard and navy vessels, a helicopter and a vessel from the European border agency Frontex were searching for survivors off the Greek islet of Farmakonissi after the boat sank early today. Authorities said 26 people were rescued.
Weather conditions in the area were good but survivors told the coast guard the boat had begun taking on water shortly after setting sail from Turkey.
Some Balkan countries, however, have stopped allowing anyone except those from war-torn countries to cross their borders, considering the rest not refugees but economic migrants seeking better jobs.
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Macedonia is allowing only people from Syria, Afghanistan and Iraq to cross, leaving thousands of others stranded on the Greek side of the border, where demonstrations have been frequent and sometimes violent
Greek police launched an operation just after dawn today to clear the migrants many of them from Iran, Morocco and Pakistan from the border area.
Escorted by police motorcyclists and patrol cars, nearly 30 buses carrying about 1,500 people headed south from the Idomeni border crossing area. The buses were expected later today in Athens, where authorities have set up shelters and will encourage the migrants to make asylum applications in Greece.
The freight rail line was expected to open later in the day.