Sept. 29, 2011  -- Iran is doubling down on the conspiracy theories after an al Qaeda magazine blasted Iranian president Mahmoud Adhmadinejad's 9/11 claims, this time suggesting the true authors of the terror publication -- which often instructs readers to murder Americans -- are not radical Islamists, but secret agents for the CIA.

Sandwiched between lengthy anti-American editorials, an al Qaeda author wrote in the latest issue of an al Qaeda English-language magazine called "Inspire" that Iranian President Mahmoud Ahmadinejad continued to spread the conspiracy theory that the U.S. government was behind the 9/11 attacks because Iran was jealous of al Qaeda.

"For them, al Qaeda was a competitor for the hearts and minds of the disenfranchised Muslims around the world," the article says. "Al Qaeda... succeeded in what Iran couldn't. Therefore it was necessary for the Iranians to discredit 9/11 and what better way to do so? Conspiracy theories."

READ: Al Qaeda to Iran: Stop Spreading 9/11 Conspiracy Theory

Responding to the article's assertions today, Iranian state news repeated Ahmadinejad's arguments and said "reports released by al Qaeda are usually believed to be produced by the U.S. Central Intelligence Agency (CIA)."

Noting the general content of "Inspire" articles, a spokesperson for the CIA told ABC News, "There are some allegations that don't even deserve comment. This is one."

Previous issues of Inspire have given detailed instructions to readers on various ways to violently attack the U.S. and its allies, including an early article called "How to Build a Bomb in the Kitchen of Your Mom".

When not teaching readers explosives or the proper stance for firing an AK-47, "Inspire" features long-winded anti-Western articles, often penned by prominent terror leaders. It also recently a eulogy for al Qaeda founder Osama bin Laden -- the man who was actually responsible for the 9/11 attacks that killed nearly 3,000 Americans, according to a years-long, painstaking U.S. investigation.