(Granger, WA)  --  The Washington State Patrol is investigating, after a five-year-old boy was struck and killed while in the parking lot of a convenience store in Yakima County.  Troopers say it happened around 4:50 p.m. Saturday in the 13-hundred block of Bailey Avenue in the town of Granger.  Police say the boy ran from behind a parked vehicle and was struck by a pickup truck.  The child's name hasn't been released.