The Secret Service has temporarily removed some of its personnel from security duties as the agency investigates their potential involvement in security failures that occurred at the July 13 rally where former President Donald Trump was nearly assassinated, according to multiple reports.

Secret Service leaders placed on administrative leave several members of the Pittsburgh Field Office, which led security planning for the Trump rally in Butler, Pennsylvania, Real Clear Politics first reported.

The Butler rally was held in an outdoor fairgrounds space. A 20-year-old lone gunman accessed the roof of a nearby building, which the Secret Service did not include in the official security perimeter, and shot at Mr. Trump. Thomas Matthew Crooks fired at least eight rounds, grazing Mr. Trump’s ear, killing one rallygoer and injuring two others.

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Fox News reported on Friday that one member of Mr. Trump’s protective team was placed on leave, along with four members of the Pittsburgh Field Office, including the special agent in charge.

CNN reported the same number but had a slightly different account, saying that five Secret Service personnel “have been reassigned to administrative duties and ordered to work from home.”

That is not the same as administrative leave, which according to the federal government Office of Personnel Management’s definition “is an administratively authorized absence from duty without loss of pay or charge to leave.”

The Secret Service would not confirm the reports or clear up the discrepancies, but the agency said in a statement that it “is committed to investigating the decisions and actions of personnel” related to the Butler rally and assassination attempt on Mr. Trump.

“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,” said Anthony Guglielmi, Secret Service chief of communications.

“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,” he said. “Given this is a personnel matter, we are not in a position to comment further.”

Ronald Rowe, the Secret Service’s acting director, told Congress last month that the agency’s Office of Professional Responsibility is reviewing personnel decisions made in the lead-up to and on the day of the attack.

“If this investigation reveals that Secret Service employees violated agency protocols, those employees will be held responsible to our disciplinary process,” he said in testimony on July 30 before two Senate committees.

Sen. Josh Hawley, Missouri Republican, pressed Mr. Rowe during the hearing on why the Secret Service had yet to fire anyone involved in securing the Butler rally.

Mr. Rowe committed to holding people accountable after the disciplinary review, but said he wouldn’t rush to judgment because he doesn’t want agents to be “unfairly persecuted.”

On Friday, Mr. Hawley said the news that the Secret Service had placed personnel on administrative leave is “long overdue.”

“I called for this weeks ago,” he posted on X. “The delay is inexplicable — and inexcusable.”