Court papers allege that at least three people helped Najibullah Zazi buy beauty products containing peroxide and acetone in suburban Denver. The chemicals can be used to make homemade bombs.
The official told The Associated Press on Monday that investigators know the identities of the three people, who are from New York City. He spoke on condition of anonymity because the investigation continues.
The official would not say anything about the whereabouts of the possible accomplices or the bomb-making materials."
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