Janice Atkinson, with the Hamilton County Sheriff's Office, told WRCB-TV (http://bit.ly/Zr9ff4) that 2-year-old Brennan Nowell died late Thursday from his injuries.
Authorities have said the child was shot in the stomach with a firearm that belonged to his grandfather.
Neighbors told the station that the child found the handgun and was playing with it when he accidentally shot himself.
Atkinson says an investigation into the shooting continues.
Information from: WRCB-TV, http://www.wrcbtv.com/