WASHINGTON — Authorities say a military base in southeast Washington was briefly locked down because of a report of an armed person, but police found nothing after a search.

The lockdown at Joint Base Anacostia-Bolling was lifted around 2:30 p.m. Sunday. Base spokeswoman Michelle Gordon says police got the report of a person with a gun in a barracks building about an hour earlier.

She says base police and District of Columbia police swept the building three times but didn’t find anything. She says investigators will review security footage in an attempt to determine what, if anything, led to the report.

Joint Base Anacostia-Bolling is shared by the Navy and Air Force.