FROM IGN:

Long-time programmer Jon Shiring confirmed to IGN he has resigned from his position at the studio. Shiring made his initial announcement through his Twitter account. Shiring did not give a reason for his resignation or where he'll end up next.

"I'm not trying to create spectacle, I just wanted to avoid the LinkedIn nonsense," he told IGN. "No announcements other than that one." Shiring spent close to six years at Infinity Ward, working on both Call of Duty 4: Modern Warfare and Modern Warfare 2.

Senior Animator Bruce Ferriz confirmed to IGN he, too, left the studio this month and has now joined Santa Monica-based developer Big Red Button Entertainment. He is currently working on an unannounced project. Ferriz spent just over one year at Infinity Ward.

Lastly, Modern Warfare 2 lead designer Mackey McCandlish has also left Infinity Ward. McCandlish had been with the studio since 2002. McCandlish confirmed his departure on his Twitter account.

Earlier this month, Infinity Ward veterans Todd Alderman and Francesco Gigliotti also revealed through LinkedIn the two had left the studio.

In March, Infinity Ward co-founders Vince Zampella and Jason West were fired by publisher Activision. The two announced this morning plans to open a new studio called Respawn Entertainment and signed a new publishing deal with rival Electronic Arts.

Update (14th April): Additional Infinity Ward employees have now left the studio. Lead Designers Steve Fukuda and Zied Reike are no longer employees, Kotaku reports. Programmer Rayme Vinson and lead artist Chris Cherubini have also now left. Cherubini confirmed he has resigned from his position.

Developers from the Infinity Ward team behind blockbuster hit Modern Warfare 2 are suing publisher Activision for breach of contract, among other things, including failing to pay due bonuses.

The plaintiffs, calling themselves the Infinity Ward Employee Group (IWEG) and consisting of "a significant portion of the members of the creative team" behind MW2, claim Activision owes them approximately $75 million to $125 million dollars.

Activision allegedly "made a calculated, purposeful and malicious decision" to withhold proper bonuses "in an attempt to force employees of Infinity Ward to continue to work at a job that many of them did not want just so Activision could force them to complete the development, production and delivery of Modern Warfare 3."