Nearly 30 US ambassadors and other senior diplomats have been removed from their posts by the Trump administration to ensure embassies reflect its "America First" priorities.
The individuals, who were posted to countries where the top US representative has traditionally been from the foreign service, were ordered back to Washington and encouraged to find new roles in the State Department, a US official told the Reuters news agency.
The State Department did not provide a list of those being recalled.
A senior department official said the move was "a standard process in any administration".
"An ambassador is a personal representative of the president, and it is the president’s right to ensure that he has individuals in these countries who advance the America First agenda," the official said, speaking on condition of anonymity.
Some diplomats reported being notified by phone with no explanation, according to the American Foreign Service Association, which represents US foreign service officers.
Donald Trump has sought to place loyalists in senior roles since starting his second term in January, after encountering resistance during his first term advancing his foreign policy priorities.