State Police investigating tractor trailer crash on Interstate 81 in Botetourt County

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BOTETOURT COUNTY, Va (WDBJ7) -- A man is in the hospital after a tractor trailer crash in Botetourt County.

According to Virginia State Police the accident happened just before 1:30 p.m. on Thursday, along Interstate 81 at mile marker 171.9.

A 2017 International Tractor Trailer was headed north when it ran off the side of the road and through a guardrail, before coming to a stop on Route 11. It blocked the roadway near Rocky Road.

The driver, Clarence Knight of Strawberry Plains, Tennessee, was wearing his seatbelt at the time. Authorities believe he had a medical emergency prior to the crash.

He was flown to the hospital for treatment.

Knight's condition is not known right now.

The crash is still being investigated.

Stay with WDBJ7 for updates.