Shots reported in building on Washington Navy Yard campus, lockdown underway, spokesman says

FILE - In this Sept. 19, 2013 file photo. military personnel walks past an entrance to the Washington Navy Yard in Washington. An official says shots have been reported in a building on the Washington Navy Yard campus. (AP Photo/Charles Dharapak, File) (The Associated Press)

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In this aerial photo taken Nov. 6, 2013, the Navy Yard Complex, along the Anacostia River, lower right, and the city of Washington is seen from Air Force One, with President Barack Obama aboard. An official says shots have been reported in a building on the Washington Navy Yard campus. (AP Photo/Pablo Martinez Monsivais) (The Associated Press)

A helicopter hovers above a police officer holding up police tape for a vehicle as a large police presence gathers along M St. Southeast in Washington, Thursday, July 2, 2015, near the Washington Navy Yard campus. The Washington Navy Yard was on lockdown Thursday morning after reports of gunshots, but a senior federal law enforcement official says there has been no confirmed report of any shooting. (AP Photo/Andrew Harnik) (The Associated Press)

WASHINGTON – An official says shots have been reported in a building on the Washington Navy Yard campus.

Navy spokesman Petty Officer 1st Class Pedro Rodriguez says a lockdown is underway.

He did not give information on injuries or other details Thursday morning.

In September 2013, military contractor Aaron Alexis killed 12 civilian workers at the Navy Yard's Building 197 before he was fatally shot by police.

The Navy Yard, in southeast Washington, is the country's oldest naval installation.