Edgar Huerta-Gonzalez, 24, of Gardena; Adrian Villa Avalos, 29, of Gardena; and Gregorio Villa-Santoya, 23, whose city of residence was unknown, were identified by coroner's investigators as the homicide victims.
All three men were believed to be killed by the same gunmen. Another man who survived told investigators that the three men were shot while they were working in a palm tree grove on Thursday. Police found the bodies of three men a short time later.
The man who survived remains in critical condition.
Anyone with more information about the killings was urged to call sheriff's detectives at (760) 393-3500.
City News Service contributed to this story.