The shooting happened 2:25 p.m. in the 15700 block of South Haskin Avenue.
All four victims were transported to the hospital, where one was pronounced dead and the other three were treated for non-life threatening injuries.
No other information was released.
Anyone with information is asked to call homicide detectives at (323) 890-5500.
DEVELOPING: We will add more details to this report as they become available.