At least five Secret Service agents have been given modified duties following the assassination attempt on former President Donald Trump in July, a police official told the Associated Press.

They include the special agent in charge of the Pittsburgh field office and three other agents assigned to that office, which was responsible for security planning ahead of the July 13 rally in Butler, Pennsylvania, according to the law enforcement official with direct knowledge of the matter. One of the five agents was assigned to Trump’s security staff, the official said.

The official was not authorized to publicly disclose details of the personnel investigation and spoke to The Associated Press on condition of anonymity.

The agents are on leave, meaning they are not allowed to carry out any investigative or protective activities.

Multiple investigations have been launched as officials investigate a complicated violation of the law that allowed a man with an AR-style rifle to get close enough to shoot and injure Trump at the rally.

Trump was hit in the ear but serious injuries were avoided. A spectator was killed and two others were injured.

The shooting represented a devastating failure by the agency to fulfill one of its core missions and led to the resignation of then-Secret Service Director Kim Cheatle.

At a congressional hearing after the assassination, Cheatle admitted that the Secret Service had been informed of a suspicious person two to five times before the shooting. She also revealed that the roof from which Thomas Matthew Crooks Days before the rally, the danger of open fire had already been identified as a potential weak point.

Acting Secret Service Director Ronald Rowe Jr., who after Cheatle’s resignationhe said “cannot defend why this roof was not better secured.”

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Associated Press writer Rebecca Santana contributed to this report.