An Amber Alert in San Diego County Monday night prompted authorities to sent text alerts to cell phone owners across Southern California.
The alert was part of a partnership between cellphone companies and the California Highway Patrol to send out urgent Amber Alerts via text messages.
James Lee DiMaggio is suspected of killing Christina Anderson, 44, of Lakeside and kidnapping one or both of her children: Hannah Anderson, 16, and Ethan Anderson, 8.
Christina Anderson's body was found Sunday night in the burning rubble of a house and garage in the rural community of Boulevard in eastern San Diego County, authorities said. She had been killed, they said.
The remains of a child were also found, but the child's identity and cause of death have not been determined, said Lt. Glenn Giannantonio of the Sheriff's Department's homicide detail.
It is believed that DiMaggio has one or both of Anderson's children with him in his blue Nissan Versa, California license plate 6WCU986, Giannantonio said.
DiMaggio is the owner of the home in Boulevard and had a "close platonic relationship" with Christina Anderson, authorities said.
Anyone with information is asked to call the homicide detail at (858) 974-2321 or (858) 565-5200, or San Diego County Crime Stoppers, (888) 580-8477.