French President Nicolas Sarkozy and German Chancellor Angela Merkel said a crisis strategy would be discussed on Sunday and adopted at the next meeting.

EU leaders need to agree a second bailout for Greece, how to recapitalise banks and a stronger bailout fund. President Sarkozy also called for talks with the private sector.

The private sector talks would be "to find an agreement allowing to strengthen the sustainability" of Greek debt.

Previous disagreements between France and Germany about the bailout plans have centred on how much the private sector would have to contribute to any package.

A spokesman for Chancellor Merkel said the leaders agreed that a "comprehensive, ambitious" answer to the crisis was needed.

The spokesman also said that the advantage of the additional summit would be that it would give the German parliament time to approve any changes to the bailout fund.