The FBI said Parks was the subject of a single file created by the agency's Detroit field office and that the file has been destroyed. It was not revealed what was in the file.
The Detroit News had filed a Freedom of Information Act request after her death requesting any files held by the FBI in Washington, Mobile, Ala. and Detroit.
Parks sparked the historic 381-day Montgomery, Ala., bus boycott in 1955 when she was arrested for refusing to give up her bus seat to a white man, providing a major impetus for the national civil rights movement.
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