One of the bullets missed the intended target and instead hit an 8-year old girl who was walking with her uncle down the street.
From an article and news video:
Investigators say at around 7 p.m., the suspect and victim were arguing in front of the victim's home. The suspect was in his car during the argument. He then got out of his car and fired several rounds at the victim, hitting him in the chest. The victim was taken to a nearby hospital, where he later died. A man who was standing near the victim was shot in the foot.
“Quite a distance away from that shooting was an eight-year-old girl walking with her uncle. She was struck in the arm, a good 40-yards from our shooter,” explained Madera Police Chief Steve Frasier.
Bullets don't know when to stop.
UPDATE (12/2/12): According to another article, the two men were both 18 years old, and the shooting was gang-related.