Central Intelligence Agency (CIA) Director Leon Panetta will hold a classified briefing for senators at 5 p.m. Tuesday on the U.S. forces killing of Osama bin Laden, Majority Leader Harry Reid (D-Nev.) said.

President Obama announced Sunday evening bin Laden was shot to death in a firefight in a compound about 30 miles from Pakistan's capital city of Islamabad.

Senators and administration officials have questioned whether Pakistani intelligence forces or the military knew bin Laden was hiding in the compound. The U.S. has provided billions in aid to that country since 9/11 in return for cooperation in the fight against terror.

Panetta will brief House lawmakers earlier in the afternoon.