(Portland, OR)  --  Police are searching for a suspect accused of stabbing two men on a beach in Seaside.  Police responded to the area of Avenue K and the Promenade Saturday morning on reports of a stabbing.  Responding officers found one man with serious stab wounds.  The second victim turned up later at a local hospital.  It's not yet clear what led to the stabbing, but police don't believe it was a random act.  An investigation is ongoing.