MONTGOMERY CO., Va. (WDBJ7) -- UPDATE:
According to Virginia State Police, the driver of the tractor trailer was injured and has been pulled from the crash.
Police say the accident happened around 5:48 p.m. Wednesday.
As of 6:08 p.m., VDOT is reporting 2.5 miles of southbound backups.
A vehicle fire is causing delays on Interstate 81 North in Montgomery County.
According to the Virginia Department of Transportation, a vehicle fire has closed the northbound and southbound lanes on Interstate 81 near mile marker 114 in Montgomery County.
Drivers should seek an alternate route if headed that way.