Deputies responded to reports of gunshots at 215th Street East and East Avenue Q around 5 p.m. Sunday, according to the Los Angeles County Sheriff's Department.
When they arrived, they found three people with fatal gunshot wounds in two separate cars. They have only been identified as a 44-year-old man, a 65-year-old woman and a second man believed to be in his 40s.
Deputies believe a suspect approached in their own vehicle and opened fire on the victims before taking off.
An investigation is underway to determine a motive for the shooting. A description of the suspect was not available.
Anyone with information about this incident is encouraged to contact the Los Angeles County Sheriff's Department's Homicide Bureau at (323) 890-5500.