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.