Two-year-old mauled to death by grandmother's pit bull

A two-year-old boy was mauled to death by his grandmother's pit bull this morning.

The boy, Holden Jernigan of Summerville, wandered into his grandmother's fenced-in backyard without her knowing it when the dog attacked, according to Dorchester County Sheriff's officials.

Authorities have not yet released the name of the grandmother, who was caring for the child at the time.