The top commander of US and NATO forces in Afghanistan has been cleared by a Pentagon inquiry into potentially inappropriate email communications with a Florida socialite, likely resurrecting his nomination to the military's top job in Europe.
Marine General John Allen was placed under investigation in November over email exchanges with one of the women at the centre of the scandal that forced David Petraeus to resign as CIA director.
Allen had strongly denied any wrongdoing.
US federal prosecutors have decided not to charge General David Petraeus' former mistress with cyberstalking after it was alleged she stalked a romantic rival online.
The US Attorney's Office in Tampa, Florida, told Reuters, "After applying relevant case law to the particular facts of this case" it had "decided not to pursue a federal case regarding the alleged acts of 'cyberstalking' involving Paula Broadwell".
Petraeus, a retired US Army general, resigned as CIA director in November after acknowledging he had an extramarital affair with Ms Broadwell.
The affair came to light after Ms Broadwell emailed Florida socialite Jill Kelley allegedly warning her to stay away from Petraeus, prompting an FBI investigation .
The brother of Paula Broadwell, the former lover of David Petraeus, has told of her "guilt and shame" over the affair that led to the downfall of the former CIA chief.
Stephen Kranz, Broadwell's brother, told People magazine: "She's been devastated by this.
"She is filled with guilt and shame for what she's done and she's incredibly sorry for the pain she's caused her husband, her family, Petraeus's family. She accepts responsibility for her actions and knows she made a mistake.
"Now (she) is really focused on repairing and protecting her family and trying to really focus on her husband and her children and protect the kids from this".
Petraeus stepped down on November 9 as head of the CIA after admitting to an affair with Broadwell, a counter-terrorism expert and the co-author of a biography of the general.
David Petraeus, has said that classified reports revealed that the strike on the American diplomatic mission in Libya was a terrorist attack - but that the administration avoided saying that it was a group of Al Qaeda affiliates, reports the New York Times.
Testifying before the House and Senate Intelligence Committees in his first public appearance since his resignation, he expressed regret for his affair.
The Florida woman who triggered the inquiry that took down Petraeus has complained about paparazzi in front of her mansion and "people calling me with threats."
Jill Kelley, whose tip about emails from the retired general's mistress sparked the FBI probe that revealed the affair, complained to Tampa Mayor Bob Buckhorn via email that she and her family were frightened by the attention they were receiving.
"I'm not sending my daughters to school today, and my husband slept at the hospital, because its just gotten too difficult to even pull out of our own driveway.
"And now, I have to deal with people calling me with threats," Kelley wrote.
"I'm scared and cannot believe what my city - in which I have contributed so much of my love, time, money and leadership - has now done to me and my innocent family," she said.
The actions of General Petraeus are "personal indiscretions" and are unlikely to affect national security, thinks Mark Jacobson, senior advisor for Truman National Security Project.
David Petraeus has expressed “regret” over the circumstances of his controversial resignation as CIA Director.
Appearing for 20 minutes in front of the Senate Intelligence Committee today, he did not expand further on the reasons for his surprise departure.
Petraeus left the post after his extramarital affair with biographer Paula Broadwell was exposed.
The retired general was facing questions over September's attacks on the US consulate in Benghazi.
He said he believed all along that it was an act of terrorism, despite the Obama administration originally describing the attack as "spontaneous".
The CIA has opened an "exploratory" investigation into the conduct of its former director David Petraeus, who resigned last week over an extramarital affair.
General David Petraeus will testify on Friday at a closed-door congressional hearing about the attack on the U.S. consulate in Benghazi.
The House Permanent Select Committee on Intelligence said in a statement that Petraeus will appear on Friday morning.
A US official has told AP news agency that the US military has suspended Paula Broadwell's security clearance.