The Federal Trade Commission reportedly wants to take a look at a few online advertising acquisitions, not just Google's planned deal to acquire DoubleClick.
The regulatory agency also plans to look into Microsoft's $6 billion deal to buy Aquantive and Yahoo's plans to buy the rest of Right Media, The Wall Street Journal reported Thursday on its Web site.
Microsoft confirmed to CNET News.com that it has been notified by the trade commission that the agency plans to review the Aquantive deal.
"We are cooperating fully and look forward to addressing any questions the FTC may have as part of their review," Microsoft spokesman Jack Evans.
In an interview last month, Microsoft division president Kevin Johnson tried to draw distinctions between the Aquantive deal and Google's DoubleClick buy, outlining why he believed that deal merited antitrust scrutiny while Microsoft's purchase did not.