Intermarche agreed in May to buy the 61 stores from Casino and notified the French competition authority of its plan in July.

Since then, debt-ridden Casino announced in December it had entered exclusive talks to sell -- 313 hypermarkets and supermarkets in France -- to Les Mousquetaires, owner of Intermarche and to Auchan Retail.

The sale would leave Casino with upmarket brand Monoprix as well as Franprix, which also focuses on city-centre stores.

(Reporting by Dominique Vidalon; Editing by Benoit Van Overstraeten)