An 18-year-old biracial woman was set on fire in Madison, Wisconsin, on Wednesday morning.
CNN reports Madison police and the FBI have launched a hate crime investigation of the incident.
The assault took place when the woman was driving.
When she stopped at a red light, police say she heard someone yell a racial epithet.'
She was identified as Althea Bernstein, a college student and a volunteer EMT.
Bernstein said she saw four white men.
One sprayed liquid on her face and neck.