Man writes on a paper mache gun during a protest outside Chapultepec castle in Mexico City

The Justice Department and a congressional committee disagree on the pace of their talks to settle a lawsuit over congressional efforts to get records related to Operation Fast and Furious, a bungled gun-tracking operation.

In a joint filing Friday night, the House Oversight and Government Reform Committee told the judge in the case that a settlement offer it received from the Justice Department this week was a “grave disappointment” and that a settlement is not possible.

“The parties are very, very far apart,” lawyers for the GOP-led committee wrote. “Indeed, they are not even conceptually on the same page. After nearly four months of negotiating in good faith, the committee reluctantly has concluded — principally as a result of the department’s settlement document — that the attorney general is not serious about settlement.” The committee added that it didn’t think court-ordered mediation would help.