President Obama has said he had seen no evidence that former CIA chief General David Petraeus compromised national security during his affair:
I have no evidence, from this point, from what I have seen, that classified information was disclosed that would have impacted on our national security.
General Petraeus served his country with great distinction. We are safer because of the work that he has done. My main hope right now is that he and his family can move on, and this ends up being a single side note on what is an otherwise extraordinary career.
General John Allen is being investigated for "inappropriate communication" with the woman at the centre of the CIA affair scandal.
The director of the CIA, General David Petraeus tendered his resignation as head of the leading U.S. spy agency on Friday.