A driver reported the attack to 911 just before 9:30 a.m., and by the time a deputy arrived only one "aggressive" dog remained.
The woman died in an ambulance while being rushed to the hospital.
Mid-afternoon, the Los Angeles County Sheriff's Department sent an alert that said: "DANGER: Active search for vicious pit bull dogs."
Detectives and animal control officers later raided a home in the Littlerock area and removed eight pit bulls, although a spokesman said it was not yet known whether those dogs were involved in the attack.
(msnNOW - May 9, 2013)
