A deadly shooting involving two National Guard members in Washington, D.C., earlier this week rattled officials across the nation, and has spurred an increased presence of federal law enforcement in the nation’s capital and an intensification of President Trump’s immigration crackdown.

The directive comes hours after President Trump said the US will pause migration from "third-world countries".

New Yorker writer Jane Mayer faced backlash after criticizing the National Guard deployment following the shooting of two guardsmen in Washington, D.C.

Two members of the West Virginia National Guard were shot near the White House, and an Afghan national who worked previously with the CIA is in custody as a suspect.

The Department of Homeland Security has identified the suspect involved in the Wednesday shooting of two National Guard members, who remain in critical condition.