WASHINGTON (AP) — The Trump administration moved its fast-paced dismantling of the U.S. Agency for International Development toward what appeared to be its final phases, telling all but a fraction of staffers worldwide that they were on leave as of Monday and notifying at least 1,600 of the U.S.-based staffers they were being fired.

The move was the latest and one of the biggest steps in what President Donald Trump and cost-cutting ally Elon Musk say is their goal of gutting the six-decade-old aid and development agency in a broader campaign to slash the size of the federal government.

The move comes after a federal judge on Friday allowed the administration to move forward with its plan to pull thousands of USAID staffers off the job in the United States and around the world. U.S. District Judge Carl Nichols rejected pleas in a lawsuit from employees to keep temporarily blocking the government’s plan.