President Donald Trump's administration plans to keep fewer than 300 staff at the U.S. Agency for International Development out of the agency's worldwide total of more than 10,000, four sources said on Thursday.

Washington's primary humanitarian aid agency has been a target of a government reorganization program spearheaded by businessman Elon Musk, a close Trump ally, since the Republican president took office on January 20.

The four sources familiar with the plan said only 294 staff at the agency would be allowed to keep their jobs, including only 12 in the Africa bureau and eight in the Asia bureau.