A San Francisco police car is parked in front of a laundromat where an argument started, which resulted in a woman being set on fire Sunday, Jan. 6, 2013, in San Francisco. San Francisco police say a woman is hospitalized with what are being described as "life-threatening injuries" after someone poured a flammable liquid on her and set her on fire. (AP Photo/Ben Margot)

SAN FRANCISCO (AP) — San Francisco police searched Sunday for a man suspected of throwing a flammable liquid at his girlfriend and severely burning her.

Officer Carlos Manfredi said witnesses in the city’s Bayview District reported hearing the woman screaming. She was taken to a hospital burn unit with life-threatening injuries.

Investigators believe her attacker was 22-year-old Dexter Oliver.

This undated photo provided by the San Francisco Police Department shows 22-year-old Dexter Oliver. San Francisco police are searching for a man suspected of throwing a flammable liquid at his ex-girlfriend and severely burning her on Sunday, Jan. 6, 2013. Investigators believe her attacker was Oliver. (AP Photo/San Francisco Police Department)
This undated photo provided by the San Francisco Police Department shows 22-year-old Dexter Oliver.  (AP Photo/San Francisco Police Department)

Manfredi said Oliver had a “dating relationship” with the woman, but he did not know the circumstances that led to the attack.

The victim’s sister told KGO-TV that Oliver doused his girlfriend with gasoline and lit her on fire during an argument at a nearby Laundromat.

Precious Craig said most of her sister’s face was burnt, and that the family expects her to recover.

Copyright 2013 The Associated Press.