David Petraeus: Paula Broadwell 'had classified documents on computer' In a speech at the University of Denver in October, Mrs Broadwell claimed that the CIA annex where two Americans were killed during the attack "had actually taken a couple of Libyan militia members prisoners." It was, she said, "an effort to get them back" that provided the motive for the deadly attack in which a total of four Americans, including US Ambassador Chris Stevens, were killed. Mrs Broadwell told the audience: "Now I don't know if a lot of you heard this, but the CIA annex had actually - had taken a couple of Libyan militia members prisoner and they think that the attack on the consulate was an effort to try to get these prisoners back. So that's still being vetted. US officials have so far made no reference to the possibility of prisoners being the catalyst for the much criticised bloodshed in Benghazi. On Sunday, a spokesman for the CIA claimed the suggestion that the agency kept prisoners in Libya was "uninformed and baseless." Mrs Broadwell has come under intense scrutiny since Gen Petraeus submitted his resignation as director of the CIA citing an extramarital affair. The fitness fanatic, who is married to her husband Scott, a radiologist, has not been seen since news of the scandal broke. Details of the pair's apparent close relationship have continued to emerge, however, with recent allegations including Gen Petraeus taking her with him on a government-funded trip to Paris in July last year. On Monday, no one was home at the Broadwell's family residence in an upmarket area of Charlotte, North Carolina. A spokesman for Charlotte Radiology Breast Centre, where Dr Broadwell works, refused to comment on his whereabouts. He "was not seeing patients today," she added.