Posted: Sep 16, 2013 7:47 AM by CNN
7:10 a.m. Update:
At least one person was injured Monday after a person fired shots inside the Washington Navy Yard, the U.S. Navy said.
An official told CNN's Barbara Starr that "several" people sustained injuries.
The incident occurred at 8:20 a.m. Authorities say there is an "active shooter" on the scene.
Several shots were fired at the Naval Sea Systems Command headquarters, in southeast Washington, D.C., the Navy said.
The Navy first informed the public of the incident in a Twitter message.
Emergency personnel were on the scene and a "shelter in place" order has been issued for Navy Yard personnel.
The headquarters -- the workplace for about 3,000 people -- is the largest of the Navy's five system commands.
It has a fiscal year budget of nearly $30 billion,
"With a force of 60,000 civilian, military and contract support personnel, NAVSEA engineers, builds, buys and maintains the Navy's ships and submarines and their combat systems," the Navy said.
Shots were fired Monday morning inside the Washington Navy Yard, the U.S. Navy tweeted.
The incident occurred at 8:20 a.m.
At least three shots were fired at the Naval Sea Systems Command headquarters, in southeast Washington, D.C., the tweet said.
We will continue to update this story as more information becomes available.