Speaking at Microsoft's E3 press conference this evening, Microsoft senior vice president of interactive entertainment Don Mattrick, has confirmed an Xbox and Activision exclusive for Treyarch's Call of Duty series.

From this point forth, Call of Duty Black Ops included, all Call of Duty add-ons, map packs and DLC will be available exclusively on Xbox 360 first with PS3 DLC following at a later date.

The deal has been signed for three years.More news as we get it!