The US Federal Bureau of Investigation, pursuant to an executive order from US President Joe Biden, released a memo containing hundreds of pages of documents. 

The documents are related to investigations aiming to uncover the Saudi government's connection to the September 11 attacks. 

The US government's investigations documented the support of Saudi officials to the kidnappers since their arrival in America.

The documents also reveal details indicating that the first two hijackers who arrived in America, Nawaf Al-Hazmi and Khaled Al-Mihdhar, may have been aided by the Saudi government and Saudi citizens present in America. 

“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 FBI memo states.

Possible American support 

In September, FBI agent Danny Gonzalez said that he was confident internal American sources aided the hijackers because "19 hijackers cannot commit a crime that kills 3,000 people alone". 

According to the memo, the FBI investigated the relationship between Al-Hazmi, Al-Mihdhar, and individuals associated with the Saudi Ministry of Islamic Affairs.

CBS News reported that the new documents come about two months after the bureau published a 16-page document revealing the significant logistical support that two Saudi hijackers received in the United States.

The office had previously investigated three Saudi nationals believed to have prior knowledge of the attack, including an official at the Saudi embassy in Washington. 

Relatives of the victims sought to obtain the records, trying to prove the complicity of the Saudi government, and the Saudi embassy in Washington did not comment on the issued memo.