A U.S. Senate Judiciary subommittee will holding a hearing Tuesday on the search advertising deal between Google Inc. and Yahoo Inc.

The hearing before the Subcommittee on Antitrust, Competition Policy and Consumer Rights on "The Google-Yahoo Agreement and the Future of Internet Advertising" will be held Tuesday at 10:30 a.m.

The hearing before the Subcommittee on Antitrust, Competition Policy and Consumer Rights comes as the U.S. Department of Justice continues its antitrust investigation into the advertising partnership between Yahoo and Google.

On June 12, Yahoo said it would run advertisements supplied by Google alongside search query results, a four-year deal estimated to bring Yahoo up to US$800 million in revenue a year.

The witnesses scheduled to testify at the hearing are: David Drummond, Google's senior vice president, corporate development and chief legal officer; Michael Callahan, Yahoo's general counsel; Brad Smith , Microsoft Corp.'s senior vice president and general counsel; Matthew Crowley, chief marketing officer, Yellowpages.com in Glendale, Calif., and Tim Carter, president and CEO, Askthebuilder.com, and a nationally syndicated newspaper columnist.