One man died and another was seriously injured in a two-vehicle accident Wednesday evening on Highway 197 in Wasco County.  According to the Oregon State Police, a preliminary investigation indicates a pickup truck driven by 77-year-old Randall Donn Marshall of Wamic was traveling south on Highway 197 near milepost 9 when it left its travel lane for an unknown reason and struck another pickup head-on.  The OSP says the driver of that truck, 45-year-old Joshua Merle Thompson of Tygh Valley, was declared deceased at the scene.  Marshall was transported by LifeFlight to a hospital for treatment of what the OSP described as serious injuries.  Another passenger in Marshall’s pickup was taken by ambulance to a hospital with non-life-threatening injuries.  The investigation into the accident is ongoing.