Mistaking a loaded gun for a video game controller, a 3-year-old in Tennessee accidentally shot and killed herself, officials said.

Cheyenne Alexis McKeehan of Norene, Tenn., shot herself Sunday night after her stepfather left his loaded Smith & Wesson handgun out on a table, Wilson County Sheriff Terry Ashe said.

Cheyenne's mother told police officers that the child was used to playing a shooting game with the Nintendo Wii video game console and likely confused the real gun with the realistic-looking black toy gun, the sheriff said.