Los Angeles police responded to the mall around 8:45 p.m. after receiving reports of shots fired. Officers put the mall on lockdown while they searched, but they didn't find the gunman or any victims.
Officers at the scene learned the boy had self-transported to a hospital with a gunshot wound to one leg, LAPD Sgt. Corbin Rhealt said. The teenager was listed in stable condition.
No arrests have been made. The motive for the shooting is not known.
City News Service contributed to this report.