Google Ad Deal Is Under Scrutiny

The Justice Department has opened a formal antitrust investigation into a deal struck last month that would allow the Internet titan Google to provide some search advertising for Yahoo, according to sources familiar with the inquiry.
Investigators are planning to demand documents not only from Google and Yahoo, but also from other large companies in the Internet and media industries, said the sources, who spoke on condition of anonymity because the investigation is ongoing.

Google and Yahoo officials have said since the deal's announcement that they would delay its implementation for a voluntary Justice Department review. But a formal investigation signals that the department may have found some cause for concern. More>>