A top Justice Department official has accused the FBI’s acting leaders of “insubordination” in a memo in which he sought to soothe anxiety inside the bureau over the potential for a broad purge of agents involved in investigating the Jan.

Acting U.S. Deputy Attorney General Emil Bove made the statements on Wednesday in a memo to staff seen by Reuters.

FBI agents who worked on the Jan. 6 probe are suing the government over plans to review the FBI workforce and agents who may have worked on the investigations.