ROANOKE COUNTY, Va. – UPDATE
This crash has been cleared, according to VDOT.
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ORIGINAL STORY
Traffic is moving slowly along I-81 northbound in Roanoke County due to a vehicle crash, according to VDOT.
Authorities said it happened at the 138.4 mile marker and has led to a 7-mile-long backup.
As of 8:27 a.m., all north lanes are closed.
Stay with 10 News for the latest traffic updates.