She was so badly burned over all of her body that rescuers said it was impossible to tell her sex.
Police say the victim, 38, was torched by an African who has lived in Germany for 20 years.
Officers say the man, who comes from the same country as the victim, hurled petrol over her as she walked on Wednesday in Kronshagen, near Kiel.German police say the victim was so badly burned it was impossible to tell her sex
Eyewitnesses claim to have spotted him with a white petrol cannister.
She is thought to have been leaving a clinic in the town when she was set ablaze, and walked down the road screaming for help.