A Virginia Western Community College official told the Associated Press Monday that the school was on lockdown and campus police were working on the situation.
College spokesman Josh Meyer said in an email that the school in Roanoke was locked down just before noon Monday. He did not specify a reason for the lockdown.
The school tweeted that people should close and lock doors and stay away from windows. Anyone who was not currently on campus was advised to avoid campus.
The college lifted its lockdown less than an hour after the initial report.
But just a few minutes later, officials announced another lockdown.
That second lockdown has also been lifted, according to the school's Facebook and Twitter accounts.
The reason behind the abrupt lockdowns remains unknown, though the Roanoke Times reported that Monday's events may have been caused by a faulty device. The school had no classes scheduled this week as exams wrapped up Saturday.