David Petraeus admits 'regret' over resignation

David Petraeus has expressed “regret” over the circumstances of his controversial resignation as CIA Director.

Appearing for 20 minutes in front of the Senate Intelligence Committee today, he did not expand further on the reasons for his surprise departure.

Petraeus left the post after his extramarital affair with biographer Paula Broadwell was exposed.

The retired general was facing questions over September's attacks on the US consulate in Benghazi.

He said he believed all along that it was an act of terrorism, despite the Obama administration originally describing the attack as "spontaneous".