U.S. Secret Service Director Randolph "Tex" Alles was sacked Monday, and U.S. Citizenship and Immigration Services Director Lee Cissna, DHS undersecretary for management Claire Grady and DHS general counsel John Mitnick are also leaving the administration.
The officials said it was unrelated to the resignation of Homeland Security Secretary Kirstjen Nielsen and a recent security breach at the president's private club in Florida.
Alles is expected to remain on the job for the time being until a new director can be appointed and confirmed, the law enforcement official told ABC News.
A former senior Customs official and retired Marine Corps general, Alles was the 25th director of the agency that is a part of the Department of Homeland Security.
Secret Service Director Randolph "Tex" Alles is leaving his job, according to the White House.
White House press secretary Sarah Sanders said later Monday that Trump has picked James M. Murray, a career USSS official, to replace Alles.
Administration sources tell Fox News that the withdrawal of Vitiello's nomination was the first step in Trump's plan to control the border crisis.
CNN is reporting this afternoon that Secret Service officials found out about the director being removed... from CNN.
The departures indicate unstable circumstances at the Department of Homeland Security, which oversees the Secret Service. "Very happy with them", Trump said during a White House event when asked by reporters about the Mar-a-Lago trespasser.
Alles, a former Marine general who had no prior ties to the Secret Service, was recommended to the post by former White House chief of staff John Kelly. This access does not afford an individual proximity to the President or other Secret Service protectees.
A DHS official described the reported firings to CNN as "a near-systematic purge".