The mistress of former CIA head David Petraeus has escaped charges over emails she sent to a supposed rival.
The US Justice Department is dropping its investigation into whether Paula Broadwell stalked her romantic rival online.
A letter from US Attorney Robert O'Neill says no federal charges will be brought in Florida related to "alleged acts of cyberstalking."
A retired Army general, Petraeus resigned as CIA director in November after acknowledging the extra-marital affair, which was exposed after Broadwell emailed Tampa socialite Jill Kelley, allegedly warning her to stay away from Petraeus and Gen. John Allen, the US commander in Afghanistan.
Ms Kelley reported the emails to the FBI, triggering an investigation that led the FBI to her emails to the married Allen, who is now under investigation by the Pentagon's inspector general.
A Justice Department spokesman declined to comment.