Was Saudi Arabia Involved In The 9/11 Terrorist Attack? FBI Releases Declassified Documents

The FBI on Wednesday released hundreds of pages of newly declassified documents detailing Saudi Arabia’s potential involvement in the Sept. 11 attacks.

The 700-page document detailed the investigation of three Saudi nationals, including a Saudi Embassy official in Washington, and whether they had advanced knowledge of the attacks. They concluded that there was insufficient evidence to charge any of the three Saudis with illegally supporting the Sept. 11 hijackers, according to an FBI memo released in May.

"Specifically, in relation to the 9/11 attacks, the hijackers knew there was a martyrdom operation, but did not know about the nature of the operation until shortly before the attack for operational security reasons," the memo stated.

The memo added that al Qaeda compartmentalized the roles within its major attacks and "did not make the attack plans known in advance to others" for fear of word getting out, the Associated Press noted.

The recent release of the declassified documents comes after the FBI declassified a 16-page document two months ago on the 20th anniversary of the attacks. The documents revealed a memo detailing "significant logistic support" that two of the Saudi hijackers received in the U.S., CBS News noted.

The FBI memo closing the investigation says they have "not identified additional groups or individuals responsible for the attack other than those currently charged."

None of the three Saudi nationals were charged and they have all left the country, the FBI said.

Despite the insufficient evidence, the released FBI documents do provide more indication that the Saudi government aided and supported al Qaeda hijackers.