WASHINGTON — The federal government’s top ethics officer sent a letter to all federal agencies late last week warning that he is “deeply concerned that the actions of some in government leadership have harmed perceptions about the importance of ethics.” He urged all federal workers to redouble their commitment to acting honorably.

The letter from David J. Apol, named acting head of the Office of Government Ethics in July by President Trump, does not include specifics about what actions by Trump administration employees have elevated his concerns. An agency spokesman declined to elaborate on Tuesday after the memo was first made public.

The two-page memo was dated Oct. 5, six days after Tom Price, the secretary of Health and Human Services, announced his resignation after questions surfaced about his use of private and government planes, and inspectors general in at least three other agencies — Interior, Treasury and the Environmental Protection Agency — announced they were conducting their own investigations into plane travel and related issues.

The memo specifically targets actions by “government leadership,” which implies Trump administration political appointees.