Cops in Louisiana said the woman also scrawled KKK on her own car.
FBI spokesman Kyle Hanrahan said: “The wounds were self-inflicted”.
Sharmeka Moffitt, 20, was seriously burned in the incident, which was widely reported, and remains in critical condition.
She called police from a park in the town of Winnsboro on Sunday night and told them three men in white hoodies doused her with a flammable liquid and ignited it.
The letters KKK, for the white supremacist organisation Ku Klux Klan, and a racial slur were scrawled on her car in what appeared to be toothpaste.
The FBI was called in to assist local authorities because the incident was initially considered a possible hate crime.
Read more: http://www.thesun.co.uk/sol/homepage/news/4606591/Woman-who-claimed-she-was-racist-victim-set-herself-on-fire.html#ixzz2AETJep73