Google will be reportedly receive the civil equivalent of a subpoena from the U.S. Federal Trade Commission as part of a probe into the companby's Internet search business, the Wall Street Journal reported on Thursday.

Google has been accused by competitors of favoring its own services over rivals in its search results.

The FTC plans to send the civil investigative demand with a request for more information, the civil equivalent of a subpoena, within five days, according to the report.

U.S. antitrust regulators have been concerned about Google's dominance of the Web search industry. Google has been also under investigation by the European Commission since last November.