The gunman who tried to kill former President Donald Trump stashed explosive devices in his car, according to a report Sunday.
Thomas Matthew Crooks, 20, parked the car near the Pennsylvania campaign rally where he opened fire Saturday, the Wall Street Journal reported, citing unidentified sources briefed on the investigation.
Bomb squad technicians were dispatched to the scene following numerous reports of suspicious packages near where Crooks carried out the attack, the Journal said.
Bomb-making materials were also found in Crooks' home in Bethel Park, Pennsylvania, according to the Associated Press, which cited two unidentified law enforcement officials.
Crooks reportedly lived with his parents in the Pittsburgh suburb about 35 miles from the rally site in Butler.
His father, Matthew Crooks, late Saturday told CNN that he was trying to figure out "what the hell is going on," and said he wouldn't comment further until after he spoke to law enforcement officials.
Thomas Crooks was a registered Republican, but also contributed $15 to a progressive Democratic organization, according to records. He apparently has no criminal record.
Officials have not yet revealed a motive for the attack.
The gunman shot Trump's upper right ear shortly after the former president began speaking to a crowd of supporters on Saturday.
A spectator, identified Sunday as Corey Comperatore, 50, was fatally shot and two others were critically wounded before the Secret Service killed Crooks, who had fired from a rooftop less than 165 yards from where Trump was speaking.
Stanley Priselac, who lives near the Crooks family home, told Reuters that "everybody kind of minds their own business" on the street, and didn't offer any observations about the shooter or his family.
"Everybody is kind of shocked, surprised, some dismay," said Priselac, 72.
Priselac's wife, Mary Priselac, 67, also said she was unaware of any "gun issue" involving Thomas Crooks.
"There's never been the police being called," she said. "You kind of have to wonder what didn't he get in life? What led to this extreme?"