Saudi secrets: Does this PROVE Islamic Kingdom knew about 9/11 before the evil attacks?

THE Saudi government may have been linked to the planning of the September 11 attacks, according to sensational new evidence.

The possibility of Saudi involvement in the bloody terror attacks on New York's World Trade Centre and the Pentagon in Washington DC could confirm long-held suspicions.

And it has now emerged that secret documents linking an al-Qaeda bomb maker to preparations for the attacks were discovered inside an envelope from the Saudi Embassy in Washington – just three miles away from the scene where 189 people died.

The explosive revelation looks set to cast a shadow over an already tense visit to the Gulf state by Barack Obama.

Saudi terror fanatic Ghassan al-Sharbi took flying lessons with some of the hijackers – and has spent the past fourteen years in the Guantanamo Bay detention camp.

Documents hidden before his 2002 arrest – including his flight school certificate – were subsequently discovered inside an official envelope from the oil-rich kingdom's US base.

An FBI document on the case reads: "After al-Sharbi was captured, the FBI discovered that he had buried a cache of documents nearby, including an envelope from the Saudi Embassy in Washington that contained al-Sharbi's flight certificate."

The intelligence memo was discovered by activist Brian McGlinchey – who is campaigning for the White House to declassify a cache of documents on foreign government ties to the attacks, which killed 2,996 people.

The exact circumstances in which al-Sharbi obtained the envelope are unclear.

However, although there is as yet no concrete evidence linking Saudi Arabia to preparations for the terror atrocity, Barack Obama has said that he could order the release of new evidence that could implicate government figures in the attacks.

Mr Obama's official visit has been overshadowed by disagreements over the Sharia-governed kingdom's controversial human rights record and the Iranian nuclear deal.

The president was not met by the nation's King Salaman upon his arrival – which some commentators have interpreted as a snub.