UPDATE: Three people are injured and one person has been airlifted to a hospital after an accident on I-81 North in Montgomery County.
It happened around 2:30 Friday afternoon at mile marker 124.
According to Virginia State Police, a Ford Explorer overturned and landed on its top. One person was ejected from the vehicle.
Traffic is moving.
We'll have more information as it becomes available.
UPDATE: The north left lane is open on I-81 North at mile marker 124 in Montgomery County.
Traffic is backed up for about four miles.
UPDATE: Traffic is backed up for six miles on I-81 North in Montgomery County.
The accident happened at mile marker 124.
Both northbound lanes are closed.
An accident on I-81 North in Montgomery County has both lanes closed.
The accident is at mile marker 124.
Drivers should use caution and expect delays.