Source: CIA director David Petraeus submits resignation over extramarital affair

Petraeus issued a statement announcing his resignation, saying, "After being married for over 37 years, I showed extremely poor judgment by engaging in an extramarital affair.

"Such behavior is unacceptable, both as a husband and as the leader of an organization such as ours. This afternoon, the president graciously accepted my resignation."

[Initial post, 3:08 p.m.] CIA Director David Petraeus submitted his resignation Friday to President Barack Obama, citing person reasons, a U.S. government source said.

According to the source, Petraeus admitted to having an extramarital affair when he asked to resign.

A retired U.S. Army general who served as the top U.S. commander in Iraq and Afghanistan, Petraeus was sworn in as the head of the CIA in September 2011.

Director of National Intelligence James Clapper issued a statement Friday confirming that Petraeus had turned in his resignation, saying his "decision to step down represents the loss of one of our nation's most respected public servants."