Officers responded to a knife attack in the 1700 block of Placentia Avenue at about 11 p.m. Tuesday. A 22-year-old man was pronounced dead at the scene.
Authorities did not release the name of the deceased victim.
While investigating the fatal stabbing, police found a 19-year-old man who had been attacked earlier at Placentia Avenue and Shalimar Drive. The second victim, who was taken to a hospital by family members, was believed to have been attacked by the same suspect.
Police suspect the attacks were possibly gang-related.
A description of the suspect was not available.
Anyone who may have helpful information for police was asked to call Detective Ramon Hernandez at (714) 754-5097.
City News Service contributed to this report.