The U.S. Defense Department has found an email chain that Hillary Rodham Clinton did not give to the State Department, the State Department said on Friday, despite her saying she had provided all work emails from her time as secretary of state.

The correspondence with Gen. David Petraeus, who was commander of U.S. Central Command at the time, started shortly before she entered office and continued during her first days as the top U.S. diplomat in January and February of 2009.

The Defense Department provided the emails to the State Department in "the last several days," State Department spokesman John Kirby said in a statement.