Authorities are investigate a video that apparently shows an activist loading a weapon on D.C.'s Freedom Plaza.
The video, titled "Open Carry March on DC a Success" was uploaded Thursday. In it, Iraq war veteran Adam Kokesh is apparently seen looking directly into the camera as he loads bullets into a shotgun
"We will not be silent; we will not obey; we will not allow our government to destroy our humanity," Kokesh says in the video, punctuating his words by loading the bullets and then cocking the gun. "We are the final American Revolution. See you next Independence Day."
It is illegal to carry guns in the District of Columbia.
The Metropolitan Police Department and U.S. Park Police said in a press release Thursday that they were in the process of evaluating the authenticity of the video.
Kokesh's Open Carry March was said to have been cancelled earlier this spring.
He originally planned for at least a thousand people to march with their guns from Virginia across Memorial Bridge into D.C., prompting police to make plans for extra staffing.
When he called off the march, Kokesh urged people to protest gun regulations at their state capitols instead.
No one else is seen in Thursday's YouTube video.
An unrelated Toy Gun March was held Wednesday in the district.