The Greek government rushed to wring out another 325 million euros in budget cuts to satisfy euro zone finance ministers mulling whether to sign off on a rescue package to save the country from a chaotic default.

A government official said the cabinet had already a proposal on the table and that Prime Minister Lucas Papademos would chair a session of the government at 3 p.m. (1300 GMT)

"There is a specific proposal by the government for the 325 million euros to be submitted to the Eurogroup tomorrow," the official, who declined to be named, told Reuters.

A second government source said: "The government will have a solution before the Eurogroup (meeting of euro zone finance ministers)."

Greek lawmakers endorsed another 3.3 billion euros in cuts in wages, pensions and jobs on Sunday despite unrest on the streets of the capital, Athens.

The violence was the worst in years, with dozens of buildings set ablaze, damaged or looted.

But the bill left unexplained 325 million euros of cuts that the European Union and International Monetary Fund now want clarified before they sign off on the bailout.

There was no immediate sign that political leaders would put pen to paper to guarantee they will implement the terms of the bailout before and after an election expected in April.

Antonis Samaras, leader of the conservative New Democracy party and a member of the coalition, has taken a harder line on the austerity measures than others in the coalition.

He is the frontrunner to become prime minister in April, and while he voted 'Yes' in parliament on Sunday and expelled from the party a quarter of his deputies for rebelling, Samaras indicated he would try to renegotiate the terms of the bailout.

There is growing doubt among Greece's foreign lenders that the country - threatened by deepening social turmoil - is willing to and capable of seeing through a second round of punishing austerity since 2010.