The commission would likely to compile its findings till December 31 and submit it to the government.
Sources said that Tuesday's session might be last session of the commission.
Imtiaz Gul, Ayesha Siddiq and Hamid Mir appeared before the commission and recorded their statements.
They exchanged, with the commission, their information regarding the May 2 US unilateral operation.
The commission reviewed other details of the investigation carried out so far regarding the incident that 'killed' al Qaeda leader, Osama bin Laden.