WASHINGTON – The State Department said Tuesday it never concluded that the consulate attack in Libya stemmed from protests over an American-made video ridiculing Islam, raising further questions about why the Obama administration used that explanation for more than a week after assailants killed the U.S. ambassador and three other Americans.

The revelation came as new documents suggested internal disagreement over appropriate levels of security before the attack, which occurred on the 11th anniversary of the Sept. 11 terror attacks on the U.S.

Briefing reporters ahead of a hotly anticipated congressional hearing Wednesday, State Department officials provided their most detailed rundown of how a peaceful day in Benghazi devolved into a sustained attack that involved multiple groups of men armed with weapons such as machine guns, rocket-propelled grenades and mortars over an expanse of more than a mile.