A panic-stricken 8-year-old girl concocted a story about two intruders after she accidentally killed her sister while playing with a gun, police said. The girl initially told police two men broke into a mobile home the family used as storage and shot her 10-year-old sister when the sister tried to call police, authorities said. Police launched a search Thursday for the intruders. Four hours later, the 8-year-old confessed she had found the .22-caliber revolver, and was playing with it when it discharged, Police Chief Richard Ausenbaugh said Thursday. The girl made up the story in panic and hid the weapon in the mobile home, he said. ``It's just an unfortunate, very, very tragic thing,'' Ausenbaugh said. ``She's just going to have to live with it for the rest of her life.'' He said no charges would be filed.