US law enforcement sources have reportedly revealed that the gunman who shot at former President Donald Trump in an assassination attempt on Saturday had explosive material inside his car and in his residence.

Multiple sources made the revelation to CNN on Sunday as the FBI and the Secret Service commenced investigation into the attack on the former President and Republican presidential nominee in the country’s 2024 presidential election.

A gunman identified by the FBI as Thomas Matthew Crooks, 20, of Bethel Park, Pennsylvania, on Saturday attempted to assassinate Trump during his campaign rally in Butler, Pennsylvania.

The gunman from the rooftop fired some gunshots which injured Trump in one ear before he (the shooter) was shot dead by the Secret Service.

CNN reports that law enforcement sources said that authorities used the gun recovered from the shooter to help determine his identity as he did not have identification on him.

A person familiar with the investigation reportedly said that the gun used in the shooting was an AR-style weapon.