5-year-old boy shoots 2-year-old sister in Ky.

A 5-year-old boy accidentally shot his 2-year-old sister to death in rural southern Kentucky with a rifle he had received as a gift last year, authorities said.

The children's mother was home at the time of the shooting Tuesday afternoon but had stepped out to the front porch for a few minutes and "she heard the gun go off," Cumberland County Coroner Gary White said. He said the rifle was kept in a corner and the family didn't realize a bullet was left inside it.