A friend and former neighbor of San Bernardino, California, attacker Syed Rizwan Farook has been arrested by the FBI, according to a U.S. Marshals Office official.

Enrique Marquez will face charges of material support for terrorism, straw purchase, and visa and marriage fraud, multiple law enforcement officials said.

Marquez bought two rifles that Farook and Farook’s wife, Tashfeen Malik, used in the December 2 mass shooting and terror attack that left 14 people dead. Marquez, 24, has told investigators he didn’t know about plans for the attack, U.S. officials have said.

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