New submitter smithz writes "Bloomberg is reporting that the U.S. Federal Trade Commission is expanding its antitrust probe of Google Inc. to include scrutiny of its new Google+ social networking service. Google this week introduced changes to its search engine so that results feature photos, news and comments from Google+. The changes sparked a backlash from bloggers, privacy groups and competitors who said the inclusion of Google+ results unfairly promotes the company's products over other information on the Web. Before expanding the probe, FTC was already investigating Google for giving preference to its own services in search results and whether that practice violates antitrust laws. The agency is also examining whether the company is using its control of the Android mobile operating system to discourage smartphone makers from using rivals' applications. Google is facing similar investigations in Europe and South Korea."