The shooting was reported at about 10:30 a.m. on the eastbound 91 Freeway near the Avalon Boulevard off-ramp, according to the California Highway Patrol.
Paramedics sent to the location on a report of a shooting took a person to a hospital for treatment of an unspecified injury, the Los Angeles County Fire Department reported. The victim's condition was not immediately available.
The Avalon Boulevard off-ramp from the eastbound 91 Freeway was blocked while an investigation was conducted.
This incident occurred several hours after a car-to-car shooting on the 710 Freeway in Bell Gardens that left one man dead.