Someone in a auto began shooting at people about 4 p.m.in Pico Rivera, according to sheriff's officials.
The series of crimes was believed to have begun with the carjacking of a dark green or black Nissan Pathfinder SUV in the Pico Rivera area about 3 p.m., officials said.
The shooters were described as a man and a woman.
One of the victims, shot near Santa Gertrudes Avenue and Alicante Road in La Mirada, was pronounced dead at the hospital, according to sheriff's officials.
No motive was given for the attack or if the victims were targeted.
"The suspects pulled up to him and shot him in the leg", Ellis said.
While sheriff's officials are still trying to account for victims, at least four shooting victims were taken from multiple locations to hospitals for treatment, according to a Los Angeles County Fire Department dispatcher. "There is no additional information available at this time, and the investigation is ongoing".
The carjacked vehicle was found abandoned at 6:30 p.m.at Amelia Mayberry Park, at Painter Avenue and Lakeland Road in unincorporated South Whittier. It was followed by at least 5 shooting incidents in Whittier, La Mirada and Norwalk.
More shootings occurred in other locations. "The number of victims, as well as their conditions are unknown at this time".
Anyone with information is asked to call the Los Angeles County Sheriff's Department's Homicide Bureau at 323-890-5500.