The CIA has said it has opened an "exploratory" investigation into the conduct of its former director David Petraeus, who resigned last week over an extramarital affair.
"At the CIA we are constantly reviewing our performance. If there are lessons to be learned from this case we'll use them to improve," a CIA spokesperson said in a statement.
"But we're not getting ahead of ourselves; an investigation is exploratory and doesn't presuppose any particular outcome."
Earlier, US law enforcement and national security officials said a computer used by Paula Broadwell, the woman whose affair with CIA Director David Petraeus led to his resignation, contained substantial classified information.
The officials said the contents and amount of classified material are significant enough to warrant a continuing investigation.
The details about material held by Ms Broadwell, a reserve officer in military intelligence, emerged as the Pentagon suspended her security clearance.
There are growing concerns among military and law enforcement officials about the potential fallout from the affair between Petraeus and Broadwell, who co-authored a biography of the retired general.
Mr Petraeus is due to testify tomorrow behind closed doors about the attack on the US Consulate in Benghazi, Libya.
Leaders of the House and Senate intelligence committees were briefed on the Mr Petraeus matter by leaders of the FBI and CIA.
During a news conference at the White House, President Barack Obama said there was no indication so far that any classified information had been disclosed as a result of the affair.
Mr Obama also said that for now, he would refrain from judging whether he should have been told earlier than last Wednesday about the probe involving his CIA chief, who resigned on Friday before the affair became public.
"I am withholding judgment with respect to how the entire process surrounding General Petraeus came up. We don't have all the information yet," Mr Obama told a White House news conference.
The president noted that had he known earlier, he might have been open to accusations of interference in a politically sensitive law enforcement matter.
