Political leaders in Athens were due to discuss an emergency government Wednesday to deal with a possible run on banks as it emerged Greeks withdrew almost $900 million in a single day, fearing their country could crash out of the euro currency by the end of the week.

An interim government would take the country through to new elections on June 17, triggered by the collapse on Tuesday of talks to form a coalition between winners of the inconclusive May 6 election.

Greeks are withdrawing euros from banks, apparently afraid of the prospect of rapid devaluation if the country leaves the European single currency and returns to the drachma.

President Karolos Papoulias warned of “great fear that could develop into a panic,” the minutes of Papoulias’ negotiations with political leaders showed, according to Reuters.