Activision has tapped yet another studio to build Call of Duty games, it appears. VideoGamer reported today--quoting UK industry expert Andy Payne--that Activision Leeds will develop "all Call of Duty handheld versions [and] iOS versions" moving forward. Activision Leeds was established earlier this year, but its development slate has yet to be officially announced. Activision Leeds may be the seventh studio working on Call of Duty games.

Payne explained that Activision having a range of studios simultaneously working on Call of Duty games allows for asset-swapping and various time-saving options.

"The two studios are saying, 'I need a tank, pull it off from the library.' And those assets are also going to be starting to be used by the mobile team, which is going to be based in Leeds," he said.

VideoGamer questioned the industry source about whether or not Activision Leeds is working on Call of Duty: Black Ops Declassified for the PlayStation Vita, but he did not answer. That game is due out this fall.

Past Call of Duty mobile games, including Call of Duty: World at War Zombies and Black Ops Zombies, were created by London-based Ideaworks Game Studio.

If Activision Leeds is in fact at work on Call of Duty games, it will mean that more than half of Activision's wholly owned studios are simultaneously developing entries in the series. The Leeds outfit will join Raven Software, Infinity Ward, Treyarch, Sledgehammer Games, Beachhead Studio, and Neversoft as contributors to the franchise.