The director of secret services, Randolph Alles, as well as other senior DHS officials leaving the country in the midst of the reform of homeland security

Two senior DHS officials leave Trump's administration, senior management officials said on Monday, highlighting the leadership vacuum within DHS as Washington struggled with the news. of Resignation of DHS Secretary Kirstjen Nielsen.

Randolph "Tex" Alles, director of the US secret service, was sacked Monday. Lee Cissna, Director of US Citizenship and Immigration Services, Claire Grady, DHS Under Secretary of Management, and John Mitnick, DHS General Counsel, are also leaving the administration. The departures of the managers are part of a general purge of senior management at the system level, while Trump's senior adviser, Stephen Miller, plans to review the policies and personnel related to the system. ;immigration.

Alles learned from the White House that he would be participating in a mass redesign of the DHS leadership a few weeks ago. The notification came before the security incident in Mar-a-Lago on March 30, a law enforcement official told CBS News. The White House press secretary, Sarah Sanders, confirmed in a statement that Alles would leave "shortly" and that James M. Murray, a career secret service member, will take office in May. A secret service source described Murray as a "good choice".

"The US Secret Service's director, Randolph 'Tex' Alles, has done a great job within the agency over the past two years, and the President is grateful for his more 40 years of service in the country, "said Sanders. "Mr. Alles will be leaving soon and President Trump has chosen James M. Murray, a career member of the USSS, to replace him as director from May."

Sara Alles, Alles' wife, told reporters: "We are very proud of the secret services, the agents are very professional, happy that he has been able to serve, they are serving the nation well. "

Grady was the official leader in December when the president wanted to oust Nielsen. The president should have placed Grady at the head of DHS, since she was the highest authority confirmed by the Senate.

A source from the House Homeland Security Committee stated that President Bennie Thompson, who oversaw DHS, had not been made aware of departures. It is unclear whether the White House has left Ron Johnson, chairman of the Senate Homeland Security Committee, with his head up.

These departures also occur when Trump announced last week that he wanted to go in a "more difficult" direction than his initial choice for immigration and customs enforcement, Tom Vitiello.

Mr. Trump has repeatedly expressed his frustration at the flow of migrants crossing the US-Mexico border and the inability of his key officials to address the problem. In recent days, he threatened to close the border, or at least a large part of it, if he did not get what he wanted.

Arden Farhi and Kathryn Watson contributed to this report.