In a statement, the committee said it first will hold a closed oversight hearing on November 15 on the Benghazi attacks, when lawmakers return after the November 6 presidential and congressional elections. The Democratic-controlled panel said additional hearings would follow.
Some Senate Republicans have said the committee should hold public hearings on the response to the attacks, in which U.S. Ambassador to Libya Christopher Stevens and three other American officials were killed.
The committee, chaired by Senator Dianne Feinstein, said it had received briefings and documents related to the attacks
It said aspects under investigation include how U.S. intelligence and threat information relating to Libya and other Middle East countries was handled before September 11, when and how such information was disseminated, and how government agencies responded to the information.