Deputies responded about 10 p.m. to a report of an assault with a deadly weapon and gunshot victim in the 1700 block of East San Luis Street, according to the Los Angeles County Sheriff's Department.
They arrived to find the victim suffering from at least one gunshot wound to her upper torso, a news release said. She was transported to a hospital, where she was pronounced dead.
The woman's name was not immediately released.
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"During the investigation it was discovered that the suspect approached the victim in a vehicle and asked her where she was from," a Sheriff's Department statement said. "The suspect then fired multiple rounds at the victim."
A description of the shooter was not available.
The homicide happened the day after the body of a missing 15-year-old girl was discovered in an industrial area of Compton.
Anyone with information about Tuesday's shooting is asked to call the sheriff's Homicide Bureau at (323) 890-5500. Tips may be submitted anonymously to Crime Stoppers at (800) 222-TIPS (8477).