Deals of the day-Mergers and acquisitions

April 3 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 1000 GMT on Tuesday: ** Australian gas producer Santos Ltd said it has received a $10.4 billion takeover bid from private equity backed Harbour Energy. ** French supermarkets Casino and Auchan have begun talks to form a partnership regarding the purchasing of food and non-food items, as competition intensifies within the domestic sector.