The chief of staff for the Immigrations and Customs Enforcement (ICE) department has resigned amid accusations of intimidating and sexually harassing male employees.

According to the Associated Press, Suzanne Barr, a longtime aide to Homeland Security head Janet Napolitano, is leaving her post “with great regret,” saying in a letter the allegations against her are unfounded, but that they pose a greater threat to the department.

“As such, I feel it is incumbent upon me to take every step necessary to prevent further harm to the agency and to prevent this from further distracting from our critical work,” Barr said in the letter.