Pakistani neuroscientist is indicted in U.S.

The notes found in the possession of Aafia Siddiqui, 36, also listed other U.S. locations, including Wall Street and the Brooklyn Bridge, said the indictment handed up by a federal grand jury in New York.

Siddiqui, a mother of three who lived in the United States from 1991 to 2002, also allegedly had notes that referred to the construction of "dirty bombs" and chemical and biological weapons. They discussed various ways to attack "enemies," including destroying reconnaissance drones and using underwater bombs and gliders, the indictment said.

The legal filing also said Siddiqui possessed a computer thumb drive that contained correspondence referring to attacks by certain cells. And it charged that other documents on the thumb drive discussed recruitment and training.

One FBI official said there was no evidence of a credible threat of a terrorist attack in anything taken from Siddiqui.

Nevertheless, the disclosures ratcheted up the growing mystery surrounding Siddiqui, a diminutive woman whom some U.S. authorities have described as one of Al Qaeda's most wanted suspects and one of the few women to penetrate the terrorist network's inner circle.

In 2004, for instance, Siddiqui was identified by top FBI and Justice Department officials as an "Al Qaeda operative and facilitator who posed a clear and present danger to America."

Later, authorities linked Siddiqui to alleged Sept. 11 mastermind Khalid Shaikh Mohammed and said she married his nephew Ammar Baluchi, who is in custody at Guantanamo Bay with Mohammed on charges of helping finance the 2001 terrorist attacks.

Some U.S. officials have alleged that Siddiqui, who has a biology degree from the Massachusetts Institute of Technology and a doctorate from Brandeis University near Boston, is connected to Al Qaeda's weapons of mass destruction program.

But on Tuesday, no one from the Justice Department or FBI would comment on the case, or whether they thought Siddiqui was involved in any terrorist activity in the U.S.