Investigators said the victims were shot while standing on the sidewalk outside the home in the 5500 block of Gifford Avenue near Slauson Avenue Friday night.
Both boys were taken to the hospital where the older teen was pronounced dead. The 15-year-old is in stable condition.
Detectives believe the shooting was gang-related. Anyone with more information about the homicide is asked to call detectives at (323) 890-5500.