Mayor Muriel Bowser sought to reassure residents in the nation's capital, adding that the National Guard deployment was unnecessary.

WASHINGTON — National Guard troops began arriving at the D.C. Armory on Tuesday morning to report for duty to carry out President Donald Trump's directive to address crime in the nation's capital.

While details of the plan were unclear, the administration is preparing to deploy hundreds of National Guard troops to Washington, a U.S. official told Reuters.