(Portland, OR)  --  A homicide investigation is now underway into the shooting of a Portland man at a gas station in Gresham last week.  Police say 34-year-old Darryl Lewis died from his injuries yesterday after being shot last Wednesday.  Police say he and another Portland man were sitting in a vehicle outside the Arco on Southeast 181st when several men pulled up next to them and opened fire.  The other man was also shot and is expected to survive.  Police are still searching for the suspects.