Official: Shots reported on Washington Navy Yard campus

WASHINGTON (AP) -- 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 any injuries or other details Thursday morning.

A heavy police and fire department presence begins blocks away from the Navy Yard, with roads blocked off and a helicopter hovering overhead.

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