11:30 PM: SPD and SFD have arrived at a 2-vehicle crash, with one on its side, on the westbound Spokane Street Viaduct (the east half of the West Seattle Bridge), by the 1st Avenue South ramp, as shown on a city traffic cam. Two people are reported hurt, and an SDOT response crew is on the way for what’s described as a “large fluid spill spanning all lanes.” They’re going to block the entire westbound bridge for now while this gets cleaned up.

11:56 PM: Officers are telling dispatch that they expect the closure to be “prolonged.”

12:43 AM: The bridge/SSV has reopened, per police-radio announcement.

ADDED 10:40 AM: We asked SFD about the people reported injured. Spokesperson David Cuerpo replied, “Crews treated a 26-year-old male who was in stable condition and a 44-year-old male who was also in stable condition. Both did not require transportation to a hospital and were left on scene with law enforcement.”