An airport K-9 alerted authorities to a bag on the C concourse around 7:45 a.m.
A spokesperson with the airport said an alert sanitation worker notified airport authorities to the unattended bag.
Viewers told WKRN an announcement was made on the public address system throughout the airport to exit the airport immediately.
A witness said the evacuation has been calm and orderly.
Traffic on Donelson Pike and areas surrounding the airport was backed up for miles.
A representative for the airport classified the dog’s notification as a "false positive."
The all-clear was issued around 9 a.m.