The IMF said that it would take part in a meeting between Ukraine and its private bondholders next week, amid rising pressure on creditors to reduce the debt.
The board of British chocolate maker Thorntons said it had agreed a takeover deal by Italian rival Ferrero that values the firm at about £111.9 million.
EU foreign ministers formally agreed to prolong to January 2016 damaging economic sanctions against Russia to ensure it fully implements Ukraine peace accords.
Moscow warned that state-linked foreign firms in Russia could be targeted for retaliation to the freezing of Russian official assets in Western Europe over legal claims from former Yukos shareholders.
European Commission chief Jean-Claude Juncker voiced frustration with Greek Prime Minister Alexis Tsipras in a media report amid the deepening debt crisis.
IMF chief Christine Lagarde warned that a resolution to five months of tortuous debt talks with Greece required "adults in the room" in an apparent sideswipe at Greek officials.
Russian officials tried to play down fears about the country's economic crisis as tensions with the West over Ukraine cast a pall over its showcase investment forum.
Greek Prime Minister Alexis Tsipras called European Commission chief Jean-Claude Juncker, their first contact on the stand-off over a bailout deal since last week.
French President Francois Hollande arrived in Algeria for a visit aimed at tackling the "common battle" of the once bitter foes against jihadists from Mali to Libya.
European Central Bank chief Mario Draghi urged all sides in the negotiations on Greece "to go the extra mile", but insisted the ball was in Athens' court.
IMF chief Christine Lagarde said that Ukraine cannot use its central bank reserves to pay creditors, rebuffing a suggestion by bondholders that it do so.