The uncle of a Colorado airport driver charged with plotting to attack New York City with homemade bombs has been indicted in a widening terror probe, two law enforcement officials said Wednesday.

The officials told The Associated Press that Naqib Jaji - who had publicly defended his nephew - was arraigned on a single felony charge in a sealed proceeding in Brooklyn two weeks ago. The charge wasn't specified.

The officials spoke to the AP on condition of anonymity because they weren't authorized to speak publicly on the matter.

Jaji is in federal custody at an undisclosed location, a third law enforcement official said, also speaking on condition of anonymity because he was not authorized to discuss the case. Such an arrangement is common when a witness is cooperating in a sensitive investigation, but the official would not say whether Jaji is cooperating.

The FBI and U.S. attorney's office in Brooklyn refused to discuss the case. Jaji's lawyer also declined to comment. Jaji, 38, is the uncle of Najibullah Zazi, who was charged in September with plotting to attack New York City with homemade bombs. Zazi stayed at his uncle's suburban Denver home for several months last year.

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