The shooting happened at about 8:30 p.m. on Monday.
Authorities say a car pulled up to another car and someone fired several shots. A male in his teens or early 20s was killed.
The driver saw that his passenger was shot by someone, pulled over and dialed 911.
There were no leads on suspects, but authorities said the shots were fired from an unknown-colored SUV.
The victim was identified as Ricardo Hernandez, 24, of Bloomington. There were two other male occupants in the Hernandez's car, and authorities say they are believed to be local Fontana gang members.