Security agents escorted the inspector general of the U.S. Department of Agriculture out of her office on Monday after she refused to comply with her firing by the Trump administration, sources familiar with the matter told Reuters.

In an email to colleagues on Saturday, reviewed by Reuters, she said the independent Council of the Inspectors General on Integrity and Efficiency “has taken the position that these termination notices do not comply with the requirements set out in law and therefore are not effective at this time.