At least five members of the U.S. Secret Service (USSS) have been placed on administrative leave following the July 13 assassination attempt against former President Donald Trump in Butler, Pennsylvania, Fox News has confirmed.

One member of Trump’s personal protective team and four members of the Secret Service’s Pittsburgh Field Office, including the special agent in charge, have been sidelined nearly six weeks after the incident. The five are still employed but are teleworking and are no longer allowed in the field. They cannot do any investigative work. 

The news comes after the Secret Service concluded internal interviews to understand how Thomas Matthew Crooks was able to fire several shots from the AGR building in Butler. The Secret Service was not able to conduct the interviews right away because the FBI was interviewing them for a separate criminal investigation, according to a source briefed on both probes.

Separately, Sen. Josh Hawley, R-Mo., on Friday revealed that a Secret Service whistleblower has come forward to claim that officials at Secret Service headquarters encouraged agents in charge of the rally not to request any extra security assets in their formal planning request. 

One bullet grazed Trump’s right ear, while firefighter Corey Comperatore was fatally struck. Rally-goers James Copenhaver and David Dutch were also shot and injured.

Former Secret Service Director Kimberly Cheatle resigned less than two weeks after the shooting and after giving her initial testimony about the event before members of Congress. Various lawmakers have called on the Secret Service to make personnel changes and fire employees in the wake of the deadly incident. 

Fox News has also learned that the threat to Trump from Iran was communicated internally at the Secret Service prior to the Butler, Pennsylvania, event and the investigation is likely looking into why the Butler event went forward, given the threat. 

The Secret Service said in a statement that the agency is committed to investigating the decisions and actions of personnel in relation to the July 13 event. 

“The U.S. Secret Service’s mission assurance review is progressing, and we are examining the processes, procedures and factors that led to this operational failure,” Anthony Guglielmi, the USSS chief of communications said in a statement.

“The U.S. Secret Service holds our personnel to the highest professional standards, and any identified and substantiated violations of policy will be investigated by the Office of Professional Responsibility for potential disciplinary action. Given this is a personnel matter, we are not in a position to comment further.”

The FBI criminal probe and the internal Secret Service review both remain active.

The FBI has previously stated that Crooks accessed the roof of a building by climbing up HVAC equipment and piping. Crooks then traversed multiple rooftops before he found his shooting position on top of a building about 150 yards from where the former president spoke at his rally.

Text messages sent by local law enforcement responsible for monitoring the rally flagged Crooks to colleagues as suspicious at least 90 minutes before he opened fire. Despite this, he was still able to shoot at Trump and the crowd.

House Oversight Committee Chairman Rep. James Comer, R-Ky., welcomed the news that action has been taken on some Secret Service members. 

“There must be accountability at the Secret Service for its historic failures that led to the attempted assassination of President Trump,” Comer said. 

“Holding negligent employees accountable is the first step. I look forward to the Task Force’s findings of its investigation. We must ensure the Secret Service does not fail again.”

Hawley also welcomed the action taken by the agency, saying it should have happened weeks ago.

“We still need real answers about the attempt on President Trump’s life and accountability for everyone involved,” Hawley said.

Hawley also revealed on Friday whistleblower claims that officials at Secret Service headquarters informally encouraged agents in charge of the Butler rally to not request any extra security assets in their formal planning request as they would be denied because Trump was a former president and not an incumbent president or vice president.

Hawley shared on X a letter he penned to Acting Secret Service Director Ronald Rowe asking for an explanation into who made such a call, if he knew about it and which security assets were left out of the manpower request for the event. 

Hawley writes that the assets included counter-sniper teams and counter Sniper Division (CSD) personnel. He writes that counter-snipers were ultimately approved but only a day before the event and that a separate whistleblower claimed previously that CSD personnel would have handcuffed the gunman after he was spotted in the parking lot with a rangefinder.

“Yet you have repeatedly suggested that no security assets had been denied for the Butler event. You must explain this apparent contradiction immediately,” Hawley writes, in part.

Meanwhile, Attorney General Merrick Garland, speaking at an unrelated event, said Friday that he could not comment on any specific suspensions.

“This was a security failure and there is both an internal and external independent investigation,” Garland said. “They will provide lessons learned to prevent such a failure from happening again.”

Sen. Chuck Grassley, R-Iowa, also welcomed news of the agents being put on leave. 

“I always say, ‘if heads don’t roll, nothing changes,’” Grassley tells Fox News. “I’m glad the Secret Service has taken a step towards accountability.”

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Former NYPD inspector Paul Mauro, a Fox News contributor, said that there were serious discrepancies in the planning and operation of the rally.

“Those discrepancies argue more things are not so much mistakes, but instead, institutional rot,” Mauro said. “And what bothers me is that the executives who have been overseeing and not solving the problems that the Secret Service clearly has will likely get off scot-free. And certainly [Homeland Security Secretary] Mayorkas and Cheatle should not be able to ride off into the sunset with their reputations intact.”

Fox News’ Audrey Conklin contributed to this report.