Law enforcement officials say the Times Square suspect attended a terror training camp in Pakistan.
Faisal Shahzad was arrested late Monday for trying to blow up an SUV two days earlier.
One official said Tuesday that Shahzad told the FBI about his training. Attorney General Eric Holder said Shahzad was providing valuable information about the nearly catastrophic attack, but Holder would not elaborate.
A second official said the camp was in the lawless tribal region of Waziristan, where the Pakistani Taliban operates with near impunity. The group has claimed responsibility for the attack, but officials say there's no evidence to back that up.
Both spoke on condition of anonymity to discuss the investigation.
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