Hospital staff said she was burned with lighter fluid.

An assault on an 18-year-old biracial woman in Wisconsin is being investigated as a hate crime after she was set on fire in her car, according to the Madison Police Department.

The victim, whose name has not been released by police, told authorities she was stopped at a red light Wednesday with her driver’s side window down when she heard someone yell a racial slur. It was at that point that four white men allegedly sprayed a liquid on her face and neck and then threw a flaming lighter at her, which caused the liquid to ignite, according to the incident report.

Scared, the victim began to drive and patted out the flames. She drove home, where her mother told her to go to the hospital.

At the hospital, the victim was treated for burns and will need to make follow-up visits for additional medical care, authorities said. Hospital staff, according to police, believe the liquid was lighter fluid.

“This is a horrifying and absolutely unacceptable crime that I will not tolerate in Madison. While we are still learning more about the details, current information suggests this may have been a premeditated crime targeted toward people of color, which makes the incident even more disturbing,” Madison Mayor Satya Rhodes-Conway said in a statement Thursday.

Police are treating this as a hate crime and are reviewing surveillance images to see if the alleged assault was captured on camera. Anyone with information on this crime is asked to contact Madison Area Crime Stoppers at (608) 266-6014 or by computer at P3Tips.com.

“This hate crime is one of multiple recent downtown incidents where people’s safety and lives have been at risk,” Rhodes-Conway said in a statement. “It is completely unacceptable and should be prosecuted to the fullest extent of the law. Everybody in Madison deserves to feel safe, and it is up to every single one of us to make that true.”