BRUSSELS, Belgium — European Union regulators will investigate whether Google Inc. has abused its dominant position in the online search market by deliberately lowering links to smaller rivals' sites in its search results.
The EU Commission's probe announced Tuesday is the first major investigation into Google's business practices anywhere in the world and could potentially result in billions in fines, as in the recent cases of Microsoft Corp. and Intel Corp.
Three competitors, one owned by Microsoft, say that links to their services appear too low on Google's general search results. They also note that when Google offers similar services, such as online price comparison, it puts its own links higher on the sponsored search results, the ones companies have to pay for.
The EU Commission will also look into whether Google prevented advertising partners from placing ads from Google's competitors on their sites.
The companies that lodged complaints in February are U.K.-based price comparison site Foundem, French legal search engine ejustice.fr and shopping site Ciao, owned by Microsoft through its own search engine Bing — which itself has has struggled to win online market share.
The investigation does not imply any wrongdoing by Google, which controls about 90 percent of the online search market in Europe, but shows that the antitrust watchdog is taking the complaints seriously enough to launch an in-depth examination of the company's practices.
The Commission has notified the U.S. Department of Justice of its investigation, which is likely to take "at least a few months," said Amelia Torres, the spokeswoman for Competition Commissioner Joaquin Almunia.
Google has maintained it is confident that it hasn't done anything wrong.