WABC-New York -- The FBI has arrested an American citizen living in Queens said to be a sleeper agent for al-Qaeda.
Investigators have tied the man to a terrorist cell set to carry out a series of bombings and assassinations in London.
The man, a naturalized citizen from Pakistan, was secretly taken into custody in April.
He is being held at the Metropolitan Correctional Center in Lower Manhattan and is said to be cooperating offering investigators significant information about al-Qaeda’s plans.
He is being held as a material witness and his family is now under federal protection.
The man has told investigators that al-Qaeda is planning more attacks in the United States. He has also revealed a scheme to smuggle terrorists across the Mexican border.
The suspect’s assertions were part of the intelligence that led to recent warnings about a summer threat from al-Qaeda.