Police: Bullets that killed 2 bystanders at Seattle festival weren't from teen shooter's gun

Two bystanders killed by bullets at a Seattle festival were not shot by a 15-year-old arrested at the scene, according to police. Four weapons were fired during the shootout, which also killed a 19-year-old suspect and injured multiple people, including a toddler. Authorities suspect gang-related motives and are seeking additional suspects.