Greece is insisting that European Union leaders meeting in Brussels must provide for sanctions against member states that unilaterally decide to shut out refugees.
Deputy Defense Minister Dimitris Vitsas, who heads a task force on migration, said Thursday that Europe should not contain “fortress-states.”
Athens has repeatedly criticized fellow EU member Austria for capping the number of migrants it lets in, which had a domino effect through the Balkans and left nearly 46,000 migrants stuck in Greece.
That figure includes 14,000 living in a waterlogged tent city set up round the closed Idomeni border crossing with non EU member Former Yugoslav Republic of Macedonia.
Greek authorities are trying to persuade people in Idomeni to move to organized shelters elsewhere, but have ruled out using violence to evacuate the camp.