There were reports of an active shooter situation at Walter Reed Medical Center in Bethesda, Maryland. But it turned out to be a drill.

WUSA is reporting that a Pentagon spokesperson said that it was an exercise on the campus.

Navy officials said it was an "ad hoc drill by tenant command."

>> Read more trending news

The base was given the all-clear by 3:20 p.m. EST.

Despite the assurance by military officials that it was a drill, a congressman who was on the base was sheltering in place and may not have known that. Maryland Congressman Dutch Ruppersberger was in a conference room with about 40 others taking shelter.

Shortly before the drill was confirmed by multiple media outlets, his representatives tweeted that he didn’t believe it was a drill.

Others posted video of the law enforcement response during the event.

About the Author

Featured

The renovation of Jekyll Island's Great Dunes golf course includes nine holes designed by Walter Travis in the 1920s for the members of the Jekyll Island Club. Several holes that were part of the original layout where located along the beach and were bulldozed in the 1950s.(Photo by Austin Kaseman)

Credit: Photo by Austin Kaseman