Authorities responded shortly before 11 a.m. to a shooting at the Village Apartment Homes at 23700 Valle del Oro, just north of Newhall Avenue, homicide Lt. Hugo Reynaga of the Los Angeles County Sheriff's Department told reporters at the scene.
Both victims suffered gunshot wounds to their upper bodies and were pronounced dead at the location, Reynaga said. Their identities were not immediately made public.
Witnesses saw a man reach over the pool fence and fire shots before running toward the apartment complex parking lot, the detectives said.
Deputies stopped a white vehicle matching the description given by witnesses within minutes and detained two young men inside as "persons of interest," Reynaga said. Their identities were not disclosed.
Early investigation shows the shooting may be gang-related, authorities said.
Anyone with information about the deaths is urged to call the sheriff's Homicide Bureau at (323) 890-5500. Tipsters may also call Crime Stoppers at 800-222-TIPS.
City News Service contributed to this report.