Authorities stand outside Gray Hall on the American University campus in Washington, D.C., on Wednesday.
A lockdown at American University has been lifted, following reports of a man with a gun on campus Wednesday just before 8 p.m.
D.C. Police say an AU student noticed a man with a gun in his holster on a university shuttle bus and took a picture, then called police. That picture was later circulated on social media by AU's official account.
The lockdown was lifted just before 9:30 p.m. No one was injured.
Officials said the man with the gun on the bus was an off-duty officer. It is not known what agency or jurisdiction he works for.
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First published December 11 2013, 5:46 PM