12:41 AM: Southbound Highway 509 is closed right now at Cloverdale – which is where you get on from the east end of the Roxbury corridor – because of a crash. The State Patrol is investigating, but a bulletin on Seattle Police radio described it as a “fatality collision,” saying the search was on for a suspected hit-run driver. No estimate yet how long the highway will stay closed.

3:04 AM: No updates yet. If you have to head out in the next few hours, you can check WSDOT’s traffic-alert map here.

6:20 AM: Reopened as of 4:30.

10:43 AM: The State Patrol’s summary of the crash says it involved a 50-year-old man on a motorcycle and two drivers in cars. All were headed southbound on 509 approaching the Myers Way exit. The motorcyclist changed lanes to exit; the hit-run driver hit him “at a high rate,” then veered into the right-side barrier. In a chain reaction, the other car then hit the car driver and veered into the motorcyclist. The first car driver left the scene; the rider’s bike wound up in the inside lane but he was found on the right shoulder and pronounced dead at the scene (the summary notes he was wearing a helmet). All the WSP has released about the hit-run driver is that they were in a Toyota (possibly white, it was noted on SPD radio last night) and that their car would be notably damaged.

4:07 PM: Additional information from WSP, which says the hit-run driver was last seen taking the Myers Way exit:

Parts from the suspect vehicle were left at the scene. It appears that the bumper of this vehicle was metallic blue painted white. The vehicle will have front and rear end damage.

WSP detectives are seeking anyone that witnessed this horrible collision or has information that would help identify the suspect vehicle. Please email Detective Gagley at Matthew.Gagley@wsp.wa.gov.