The State Department is sending formal layoff notices to 1,107 civil service employees and 246 foreign service officers with domestic assignments, according to internal department communication reviewed by ABC News.

The State Department began firing more than 1,350 U.S.-based employees on Friday as the administration of President Donald Trump presses ahead with an unprecedented overhaul of its diplomatic corps, a move critics say will undermine U.S. ability to defend and promote U.S. interests abroad.