10:23 PM: Southbound Highway 509 is blocked south of the 1st Avenue South Bridge right now after what was initially dispatched as a pedestrian fatality. The driver who hit them is reported to have stopped and was with police. No other details yet, but if you have to head this way from north of there, find an alternate route.

10:37 PM: Police have just told dispatch that State Patrol is taking over the scene.

11:42 PM: WSP confirms this was a driver hitting and killing a pedestrian and says the driver was not impaired. It appears traffic is still being guided off at the West Marginal exit.