Employees at French retailer Casino are demonstrating outside the group's head office in Vitry-sur-Seine, south of Paris. Unions called for the protest as the food retail group has declared itself to be in financial difficulty, saying it is ready to sell stores to competitors. The group owns several supermarket chains such as Monoprix, Franprix, Exito, Pao de Acucar... 200,000 employees work for the Casino group worldwide including 50,000 in France. IMAGES AND SOUNDBITES (COMPLETES VIDI346W6W3_EN)