From the piece:
Google Inc. is set to announce later Tuesday that European antitrust authorities have opened a preliminary probe into complaints made against it by three European Internet companies, according to people familiar with the matter. The inquiry into allegations of anticompetitive behavior is at an early, fact-finding stage and may not result in any action. But it appeared to be the first time that European antitrust authorities have examined Google’s conduct outside of a merger review. It also comes at a time of heightened scrutiny of Google in Europe, where the company has an even more dominant position in search advertising than it does in the U.S.