US Secretary of State Hillary Clinton will testify before a congressional committee next month on the handling of the deadly attack on the US diplomatic mission in Benghazi, Libya.
The US Ambassador to Libya Christopher Stevens and three other Americans were killed in the attack on 11 September.
US intelligence and State Department officials testified behind closed doors on Capitol Hill today.
Former CIA Director David Petraeus had initially been scheduled to testify at today's closed Senate and House of Representatives intelligence committee hearings, but he will now be a solo witness before those panels tomorrow.
Republicans have accused the Obama administration of misinformation in the early days following attack.
Administration officials say their initial comments that it appeared the attack grew spontaneously out of protests over an anti-Muslim film rather than a premeditated strike were based on the best available information at that time.