UPDATE: Lanes re-open on I-81 North in Roanoke County

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ROANOKE CO., Va. (WDBJ7) UPDATE: All northbound lanes are now open and traffic is moving along.

A wreck is causing major slowdowns on I-81 in Roanoke County Wednesday morning.

The northbound left lane is blocked at mile marker 134. It is foggy in that area.

There is a 2-mile backup as of 7:45 a.m.

Avoid the area if possible.