Updated at 11:30 p.m. June 14.
Deputies responding to a call of a child bitten by a dog found a woman holding the fatally injured 8-month-old boy in her arms Thursday afternoon in Lemon Grove, authorities say.
Investigators say a pit bull attacked the baby just before 5 p.m. Thursday at a home on the 3500 block of West Street.
Paramedics from the Lemon Grove Fire Department arrived at the same time as deputies and began treating the mortally wounded infant, according to sheriff's homicide Lt. Larry Nesbitt.
The boy was transported to Rady Children's Hospital, where he was pronounced dead at 6:06 p.m., Nesbitt said. The baby's name was not released, pending identification by the San Diego County Medical Examiner's Office.
According to authorities, animal control officers seized three apparent pit bulls from the home.
The occupants of the home were being interviewed by detectives, authorities said. 10News is reporting there were no other children in the house.
Homicide detectives were called to assume the investigation because it involved the death of an infant, Nesbitt said.
Assisting in the investigation are personnel from the Lemon Grove Sheriff's Station, the sheriff's Crime Lab, and U.S. Border Patrol assigned to the homicide detail.
Anyone with information about the incident is asked to call investigators at 858-974-2321 (after hours) or 858-565-5200, or Crime Stoppers at 888-580-8477 (TIPS).