From the south and passing near intersection of se holgate and 30th ave it banked and headed over the river towrds downtown PDX.I saw two strong rounded lights, like headlights, coming my way at an altitude a little low for passenger jet, quite quiet.the f-15's have cruised over consistently since 9/11 but this was larger. It was of similiar shape as a fighter.as it banked I saw a flashing red light similiar to Passenger jet's blink maybe twice and, at same time I saw two circular lights on bottom of craft.it was quiter and slower and a different type of shape than i'm used to seeing.i pretty much watch the sky every nite.i've seen a few ufo's in my life. one very dramatic in ca.and i seen alot of planes.this one was different enuf to wonder about.the one other thing i'd mention is that the type of evening it had been for me was consistent with my experience with my previous sightings.there was a little something simpatico about the event of my evening. in a playful way things seemed a touch otherly, if u know what i mean.don't let anyone tell you what you've seen is readily explained.trust your eyes and your instincts.