New Orleans police say they have arrested a 42-year-old security guard in the death of her grandson, who apparently was shot when the gun under her pillow went off while they slept.

Officer Garry Flot says in a news release that the bullet hit the boy in the chest about 2:10 a.m. Wednesday. The child died at a nearby hospital.

Flot says Deonca Kennedy was arrested Wednesday on charges of negligent homicide, cruelty to a juvenile and child desertion.

He says the investigation is continuing.

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This story has been corrected to show that grandmother is 42, not 45.