West Virginia National Guard troops have begun to arrive in Washington, DC, to assist with President Donald Trump’s crime crackdown in the nation’s capital, a defense official told CNN on Tuesday.

Six states have pledged to send troops to Washington, D.C., swelling the number of National Guard brought to support federal law enforcement.

Hundreds more National Guard troops are expected to arrive in Washington, D.C., in the coming days, with at least four Republican-led states offering to send soldiers.