(Portland, OR)  --  An investigation is ongoing into a suspicious death in the Argay Terrace Neighborhood.  The Portland Police Bureau says a man's body was found in the street near 143rd and Milton Street around 6:30 yesterday morning.  Police initially thought the man may have been killed by a hit and run driver but later said there were suspicious circumstances to the man's death.  They're asking anyone with information about how the man died to contact Portland Police.