ROANOKE COUNTY, Va. -

Update: Interstate 81 North in Roanoke County is back open following a wreck Sunday night involving three tractor trailers. No one was injured, but Virginia State Police did cite one driver for following too closely.

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A traffic alert for drivers in Roanoke County.

An accident involving three tractor trailers has closed the north left shoulder, left lane, and right lane near mile marker 135 on Interstate 81 

Right now, traffic is backed up about 5 miles. 

WDBJ7 has a crew on the scene and will bring you the latest online and on-air tonight at 11:00 p.m.