State Department officials delivered 1,296 new pages of emails from Amb. Chris Stevens, who was killed in the 2012 terror attack on the U.S. diplomatic compound in Benghazi, to the committee investigating the incident Tuesday.

The document production came just two days before Hillary Clinton is slated to appear before the House Select Committee on Benghazi to testify about her handling of the attack. The select committee had already received thousands of pages of Stevens' emails.

Democrats on the panel sent out a "fact check" earlier Tuesday in which they disputed claims that the select committee was the first to examine Stevens' correspondence. The minority cited six emails they said had already been reviewed by other congressional committees, including the House Committee on Oversight and Government Reform.

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But many of the thousands of pages of Stevens' emails that have been given to the Benghazi panel were never reviewed by other committees, simply because lawmakers never before requested those records from the State Department.

Rep. Trey Gowdy, chairman of the select committee, said the Stevens emails were more important to his probe than records related to Clinton.

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