WASHINGTON – Fresh reports piled pressure Monday on FBI and CIA officials to explain the circumstances and timing of an investigation that ended the storied career of spy chief David Petraeus just three days after President Barack Obama's reelection. Information also emerged about the woman who received emails that led to the FBI's discovery of an affair by Petraeus, an American hero credited with turning the tide of the Iraq war. He resigned as head of the Central Intelligence Agency Friday after admitting an extramarital affair, sparking concerns of a security breach and sending shock waves around Washington. Petraeus and his biographer, 40-year-old Paula Broadwell, have been quiet about details of their relationship. Members of Congress have asked whether national security was compromised and why they weren't told sooner. “We received no advanced notice. It was like a lightning bolt,” Democratic Sen. Dianne Feinstein, who heads the Senate Intelligence Committee, said on “Fox News Sunday.” Petraeus had been scheduled to appear before congressional committees on Thursday to testify about the Sept. 11 attack on the US Consulate in Benghazi, Libya, that killed four Americans, including US Ambassador Chris Stevens. CIA deputy director Michael Morell was expected to testify in place of Petraeus, but Feinstein and others didn't rule out the possibility that Congress will compel Petraeus to testify at a later date. A senior US military official identified the woman who received the harassing emails that led the FBI to the affair as Jill Kelley, 37, who serves as an unpaid social liaison to MacDill Air Force Base in Tampa, where the military's Central Command and Special Operations Command are located. The military official who identified Kelley spoke on condition of anonymity because he was not authorized to publicly discuss the investigation. He said Kelley had received harassing emails from Broadwell, which led the FBI to examine her email account and eventually discover her relationship with Petraeus. The FBI contacted Petraeus and other intelligence officials, and Director of National Intelligence James Clapper asked Petraeus to resign. – Agencies