Interior Minister Milan Chovanec told Czech public radio that they started their protest after some 40 other migrants were returned from the center to another European country. In a statement sent through Mikulas Vymetal, a Protestant priest, to the local CTK news agency, the asylum-seekers complain they've been detained too long and say they would rather die than return home. Thousands of refugees and other migrants are gathered at Greece's border with Macedonia waiting to continue their journey north toward more prosperous European Union countries, as the surge of people heading to the Greek mainland from the eastern Aegean islands continues following the end of a ferry strike last week. Slovenia has started erecting a barbed-wire fence on the border with Croatia to prevent uncontrolled entry of migrants into the already overwhelmed Alpine state. A convoy of army trucks carrying barbed wire arrived early Wednesday in Veliki Obrez, at the Slovenian border with Croatia. Turkey's state-run news agency says 14 migrants drowned when their boat sank off the Turkish northern Aegean coast of Ayvacik.