(Portland, OR)  --  Police are searching for a suspect accused of stabbing an off-duty fire lieutenant at a bar in southwest Portland.  Authorities say the 23-year veteran of Portland Fire & Rescue was at the Kingston Sports Bar and Grill on Southwest Morrison street around 8 o'clock Saturday night when a man walked in off the street and stabbed him.  Police have released surveillance images of the suspect.  The fire lieutenant was treated at a hospital and is now recovering at home.