"Significant portion of migration to Europe passes though Greece, that’s why there are concerns that if the situation in the country gets out of control and develops on its own, this will worsen Athens’ actions on migration policy," Zaoralek said.
Greece has already failed to fulfill its responsibility to protect the Schengen Area borders from undocumented migrants, the foreign minister stressed, adding that "economic chaos" will worsen the situation.
On Sunday, Greeks will vote in a referendum on whether or not to accept a new bailout deal offered by the country's international creditors. The vote comes after the country failed to unlock financial aid from its creditors on Tuesday, that made a $1.7-billion loan repayment to the IMF impossible.
Greece owes about $270 billion of its total $350-billion debt to its biggest international lenders — the European Central Bank, the International Monetary Fund (IMF) and eurozone nations.