James Dennehy, who leads the FBI New York Field Office, revealed to his staff on Monday that he was forced to step down, a move that comes after he resisted directives from President Donald Trump’s appointees at the Department of Justice.

Dennehy wrote in a message to his staff, which was reviewed by the Washington Examiner, that he was told late on Friday that he was to retire on Monday. He “was not given a reason for this decision,” he wrote.