Via the Telegraph (UK):
Although the emails, believed to have been sent anonymously by 40-year-old Mrs Broadwell, reportedly contained hints of classified information, the FBI concluded that there was no security threat and that they were instead looking at a bizarre case of lover's jealousy.
"It didn't start with Petraeus, but in the course of the investigation they stumbled across him," one
Congressional official told the New York Times. "We were stunned."
According to the New York Post, the married mother-of two had told the other woman "I know what you did" and warned her to "back off" from the former four-star general.
A military official said Gen Petraeus and Ms Kelly were friends who had seen each other often.
There is no suggestion they were involved in a relationship.
A social column in the Tampa Bay Times noted that Gen Petraeus and his wife attended a pirate-themed festival party at the house of a Jill and Scott Kelley in February 2010.
Gen Petraeus was the head of the US Central Command, based in Florida, at the time.