An affiliate of casino giant Caesars Entertainment Corp., which is in danger of following its biggest unit into bankruptcy proceedings, is considering a sale of its fast-growing mobile- and social-games business, Dow Jones Newswires reported on Friday. Caesars Entertainment's interactive unit is working with investment bank Raine Group LLC to evaluate unsolicited bids that have exceeded $4 billion. Suitors include financial firms and gaming, media and entertainment companies. Caesars Interactive Entertainment, or CIE as the unit is known, is one of the largest online, mobile- and social-gaming companies, with annual sales of nearly $800 million. It notched year-over-year revenue growth of 28.8 percent in the first quarter.