Capital flight from beleaguered Greek banks this week alone could be more than €3bn (£2.1bn), reports say.
Savers are moving funds as time runs out to resolve Greece's debt crisis.
It
is understood the European Central Bank (ECB) will hold a telephone
conference later to discuss more emergency assistance for the banks.
The pace of withdrawals has gained speed as talks between the government and its creditors have collapsed.
Greece
has less than two weeks remaining to strike a deal or face defaulting
on a €1.6bn (£1.1bn) loan repayment due to the International Monetary
Fund (IMF).
The country has already rolled a €300m payment into those due on 30 June.
