Vanderbilt University's main administration building was evacuated Wednesday morning after a suspicious envelope was found taped to the door.
The lockdown was initiated at Kirkland Hall off of West End Avenue around 8:15 a.m.
Vanderbilt police searched the building for other possible threats but nothing was found.
The lockdown was lifted about an hour later, around 9:20 a.m.
The building is now open.
The envelope, its contents and where it came from is being investigated.
The following are mugshots of individuals arrested in May by local authorities in Northeast Tennessee.
441 Murfreesboro Road Nashville, TN 37210