The D.C. metropolitan Metro system briefly closed at least one entrance at a Virginia station to the public, amid security concerns as the city braced for the “Unite the Right” white nationalist rally.

A spokesperson for Fairfax County, Va., confirmed that the north entrance to the Vienna Metro station had been closed, but denied earlier reports from a WUSA reporter that authorities were still allowing "Unite the Right" attendees to enter.

Video posted to Twitter by WUSA reporter Mike Valerio showed about a dozen police officers in riot gear entering the north entrance of the Vienna metro station.

Attendees of the rally, which is taking place Sunday evening in D.C. on the first anniversary of the deadly “Unite the Right” rally in Charlottesville, Va., are expected to take the Metro from the Vienna station to the Foggy Bottom station and walk to Lafayette Park near the White House.

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The Metro system originally floated the idea of providing private train cars to rally attendees over safety concerns, but scrapped the idea following backlash.

This year’s rally is expected to be dwarfed by hundreds of counterprotesters who gathered in D.C. beginning earlier in the day.

Updated at 5:11 p.m.