Portland, Ore. (AP) - A federal grand jury has indicted a Somali-American man in an alleged plot to blow up a car bomb at a Christmas tree lighting ceremony in Portland, Ore.

The indictment filed Monday charges 19-year-old Mohamed Osman Mohamud with attempted use of a weapon of mass destruction.

The teen was arrested Friday evening in an FBI sting operation that followed months of investigation.

Mohamud was due in federal court for a hearing at 1:30 p.m. Monday.

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