Warner Bros. has apologized to Sony Pictures over a derogatory message about Sony’s “Foxcatcher” on a Twitter account, created by a consultant working for WB.

Warner Bros. has also fired the unidentified consultant.

The Twitter account “WB Digital” tweeted on Friday about Olympic wrestler Mark Schultz criticizing “Foxcatcher” director Bennett Miller over how Schultz was portrayed in the film. Channing Tatum portrays Mark Schultz and Mark Ruffalo portrays his brother Dave Schultz.

Warner Bros. first responded Saturday by asking Twitter to suspend the account, asserting that it was an imposter account but later found that the account was created by an outside consultant doing promotional work for the studio.

“The retweet was posted as a general entertainment story, but posting anything that can be seen as a negative comment about one of our competitors is totally unacceptable and contrary to our operating policies,” the studio said in a statement. “As Sue Kroll, President, Worldwide Marketing and International Distribution, said earlier today: ‘Warner Bros. simply does not do business that way.’ The suspended Twitter account will not be reactivated and the consultant is no longer in our employ. We apologize to our friends at Sony.”

“Foxcatcher,” released in the U.S. on Nov. 14 by Sony Pictures Classics, is a contender in several major award categories. Steve Carell (pictured above with Tatum) stars as John du Pont.