Editor's Note: The victim has died. Read the update here.
Fairfax County Police are investigating a hit-and-run crash that seriously injured a pedestrian.
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The crash happened about 10:30 p.m. Wednesday on Route 1 and Huntington Avenue in the Alexandria section of the county, just south of the Capital Beltway.
The victim has been hospitalized with life-threatening injuries.
Police have not yet provided a description of the vehicle that left the scene. Crash Reconstruction Unit detectives are investigating.