The Governing Council of the ECB is to hold an emergency meeting today, as Greece edges closer to defaulting on its international debts.
It's understood the council will consider stopping emergency lending to Greece's banks.
That may force the banks to close their doors from Monday, to prevent more customers withdrawing their savings.
Austria's finance minister Hans Jorg Schelling says that Greece's exit from the eurozone "appears almost inevitable".
Greece has effectively run out of money and must make a 1.6 billion euro payment to the IMF by Tuesday or risk a default.
Meanwhile, the Greek parliament has backed a government plan to hold a referendum next Sunday on the bailout terms offered by its international creditors.

