The make-up of Greece’s interim government will be announced later on Wednesday, a government official said.
The announcement came as talks dragged into a third day without any sign of progress.
The official said PM George Papandreou, who has agreed to step down, would meet the president in the morning before talks with party leaders.
Greece is under mounting pressure from Europe to end its political crisis and pass a key bailout package.
‘Affirm commitment’
Negotiations have been taking place between Mr Papandreou and Antonis Samaras, leader of the largest opposition party New Democracy, since Monday.
It is unclear whether any agreement was made during talks on Tuesday, with some reports suggesting leaders remain undecided on who will lead the new coalition.
Lucas Papademos, a former vice-president of the European Central Bank (ECB), was widely seen as the front-runner to replace Mr Papandreou, but there are unconfirmed reports his candidacy has run into trouble.
“The Papademos candidacy has hit problems that have to do with both parties,” one of the sources told Reuters, on condition of anonymity.
Other possible candidates named in the Greek media include Nikiforos Diamandouros, Greece’s European ombudsman, and Panagiotis Roumeliotis, Greece’s representative to the International Monetary Fund (IMF).
