WASHINGTON — The F.B.I. investigation that led to the sudden resignation of David H. Petraeus as C.I.A. director on Friday began with a complaint several months ago about “harassing” e-mails sent by Paula Broadwell, Mr. Petraeus’s biographer, to another woman who knows both of them, two government officials briefed on the case said Saturday.
When F.B.I. agents following up on the complaint began to examine Ms. Broadwell’s e-mails, they discovered exchanges between her and Mr. Petraeus that revealed that they were having an affair, said several officials who spoke of the investigation on the condition of anonymity. They also discovered that Ms. Broadwell possessed certain classified information, one official said, but apparently concluded that it was probably not Mr. Petraeus who had given it to her and that there had been no major breach of security. No leak charges are expected to be filed as a result of the investigation.
The identity of the woman who complained about the harassing messages from Ms. Broadwell has not been disclosed. She was not a family member or in the government, the officials said, and the nature of her relationship with Mr. Petraeus was not immediately known. But they said the two women seemed to be competing for Mr. Petraeus’s loyalty, if not his affection.
One Congressional official who was briefed on the matter said senior intelligence officials explained that the F.B.I. investigation “started with two women” — evidently Ms. Broadwell and the woman who complained about her e-mails. “It didn’t start with Petraeus, but in the course of the investigation they stumbled across him,” said the Congressional official. “We were stunned.”
Ms. Broadwell has made no statement since the affair became public on Friday, and attempts to reach her for comment have been unsuccessful.
The circumstances surrounding the collapse of Mr. Petraeus’s career remain murky. It is not clear when Attorney General Eric H. Holder Jr. or Robert S. Mueller III, the director of the F.B.I., became aware that the F.B.I.’s investigation into Ms. Broadwell’s e-mails had brought to light compromising information about Mr. Petraeus. Tracy Schmaler, a spokeswoman for Mr. Holder, declined to comment Saturday.
Neither the Congressional Intelligence Committees nor the White House learned of the investigation or the link to Mr. Petraeus until last week, officials said. Neither did Mr. Petraeus’s boss, James R. Clapper Jr., the director of national intelligence.
A senior intelligence official said Saturday that Mr. Clapper had learned of Mr. Petraeus’s situation only when the F.B.I. notified him, about 5 p.m. on Tuesday, election night. That evening and the next day, the official said, the two men discussed the situation, and Mr. Clapper told Mr. Petraeus “that he thought the right thing to do would be to resign,” the intelligence official said.
Mr. Clapper notified the president’s senior national security staff late Wednesday that Mr. Petraeus was considering resigning because of an extramarital affair, the official said.
The decisions on when to notify various administration officials, including Mr. Clapper on Tuesday, were “a judgment call consistent with policies and procedures,” according to one of the government officials who had been briefed.
If the investigation had uncovered serious security breaches or other grave problems, he said, the notifications would have been immediate. As it was, however, the matter seemed to involve private relationships with little implication for national security.
Some Congressional staff members said they believed that the bureau should have informed at least the Republican and Democratic leaders of the House and Senate Intelligence Committees about the unfolding inquiry. A spokesman for Representative Mike Rogers, a Michigan Republican who heads the House Intelligence Committee, said the lawmaker had summoned Sean Joyce, the F.B.I.’s deputy director, and Michael J. Morrell, the deputy C.I.A. director, for closed briefings on Wednesday about the investigation.
