Active Shooter at Washington Navy Yard [Update: Official Confirms Hoax/Swatting attempt]

U.S. Park Police are responding Thursday to a report of an active shooter at the Navy Yard inside the Washington, D.C., city limits, WUSA reports.

An employee inside the 41-acre facility reports that alarms are sounding and the buildings are on lockdown, WUSA reports..

There are no immediate report of casualties.

The Navy yard is located on the Anacostia River less than a mile south of the U.S. Capitol.

In 2013, a gunman shot who got into a building at the Navy Yard killed 12 people and injured three others. He was fatally shot by a Washington Metropolitan police officer.