Bill Ward – drummer with Black Sabbath – has threatened to pull of the legendary heavy metal band's latest reunion.

Ward has stated that he is unhappy with the contract for the band's new album and world tour, and has said that he will not take part in the new album sessions and shows if a 'fair agreement' is not met. Posting a statement on his Facebook yesterday (February 2), Ward wrote:

"I am unable to continue unless a 'signable' contract is drawn up; a contract that reflects some dignity and respect toward me as an original member of the band.

He continued to express his dissatisfaction, writing: "Several days ago, after nearly a year of trying to negotiate, another "unsignable" contract was handed to me... The place I'm in feels lousy and lonely because as much as I want to play and participate, I also have to stand for something and not sign on. If I sign as-is, I stand to lose my rights, dignity and respectability as a rock musician. I believe in freedom and freedom of speech."

Ward does not detail the exact terms of the contract, but added that he "definitely want[s] to play on the album, and I definitely want to tour with Black Sabbath" but explained he feels he cannot do so until he is handed a different contract.

He also said that he was not motivated by 'greed'. "My position is not greed-driven," he wrote. "I'm not holding out for a "big piece" of the action (money) like some kind of blackmail deal. I'd like something that recognizes and is reflective of my contributions to the band.”

To see the full statement, visit: Facebook.com/billward

Black Sabbath are set to headline the closing night of Download Festival this June and will then embark on a world tour and release a new, Rick Rubin produced album.