Arkady Dvorkovich, economic adviser to Medvedev who is in Brussels for a summit with European Union leaders, said that $10 billion due to be returned from the IMF next year would remain with the IMF for special euro-zone aid as soon as the Fund asked.

"Ten billion dollars is the minimum commitment, " Arkady Dvorkovich told journalists after Medvedev talked with EU leaders about their plans to fight the debt crisis over dinner on Wednesday night.

"We are ready to contribute our portion of financial assistance.when the IMF tell us it's time."