General Allen maintains his innocence. If he is not guilty of any wrong doings, I say stay in it for the long haul. That would be the correct judgement call.
Mr Panetta said in a statement that his department was informed about the case by the FBI on Sunday and that he had referred it to the Pentagon's inspector general for investigation.
He had ordered a Pentagon investigation of Gen Allen on Monday, he said.
He added Gen Allen would remain in Kabul as the commander of NATO-led security forces but that he had asked the Senate Armed Services Committee to delay action on Allen's pending nomination to be NATO's supreme allied commander.