Police said another person was in critical condition and two more were taken to a hospital with lesser wounds.
Authorities said there's a strong possibility that the shootings are gang related. They said it may have been a problem within one gang.
Witnesses said they heard gunshots after a white Honda pulled up to a house on Innes Avenue.
Police said the Honda used in the shooting was stolen from Monterrey Park.
Seven people were detained for questioning.
A gun was recovered at the scene.
The Associated Press contributed to this report.