Marty O'Donnell, the well known Halo series composer, has been terminated by Bungie according to a tweet from the composer.

"I'm saddened to say that Bungie's board of directors terminated me without cause on April 11, 2014," O'Donnell wrote. O'Donnell was one of the last employees still at Bungie prior to its Microsoft purchase of the company back in 1999, and has a rather large list of games worked on.

O'Donnell is well known for his work on the Halo series, but has also composed music for Oni as well as Myth. He joined Bungie as audio director after working on Myth 2, Oni and Halo: Combat Evolved's scores on a contract basis. O'Donnell was working on Bungie's upcoming sci-fi group shooter Destiny.

We've contacted Bungie and will clarify once we know more.