SEATTLE (AP) — The bullets that killed two bystanders during a shootout at a crowded Seattle food festival last weekend do not appear to have come from the gun that a 15-year-old arrested at the scene was firing, police said in court documents filed Wednesday. The King County prosecutor’s office filed charges of first-degree assault with a firearm enhancement as well as unlawful possession of a handgun by someone under 18. The statement did not indicate who might have fired the bullets that killed the bystanders. The shooting in the waning hours of the three-day Bite of Seattle festival left three people dead, including a 19-year-old gunman, and at least four people injured, including a toddler. It was not immediately clear whether the firearm enhancement might add additional time in juvenile detention.