NEW ORLEANS – The man who rammed a pickup truck into a crowd of New Year’s revelers in New Orleans had suspected bomb-making materials at his home and reserved the vehicle used in the deadly attack more than six weeks earlier, law enforcement officials told The Associated Press on Friday.

Federal authorities searching the home of Shamsud-Din Jabbar in Houston found a workbench in the garage and hazardous materials believed to have been used to make explosive devices, according to law enforcement officials familiar with the search. The officials were not authorized to speak about the ongoing inquiry and spoke to the AP on the condition of anonymity.

The FBI investigation also revealed that Jabbar purchased a cooler in Vidor, Texas, hours before the attack and gun oil from a store in Sulphur, Louisiana, the officials said. Authorities also determined Jabbar booked his rental of the pickup truck on Nov. 14, suggesting he may have been plotting the attack for more than six weeks.

Authorities say 14 people were killed and about 30 were injured in the attack early Wednesday by Jabbar, a former Army soldier who posted several videos on his Facebook hours before the attack previewing the violence he would unleash and proclaiming his support for the Islamic State militant group. The coroner’s office listed the cause of death for all 14 victims as “blunt force injuries.”

Jabbar, 42, was fatally shot in a firefight with police at the scene of the deadly crash on Bourbon Street, famous worldwide for its festive vibes in New Orleans’ historic French Quarter.

Authorities found crude bombs that had been planted in the neighborhood in an apparent attempt to cause more carnage. Two improvised explosive devices left in coolers several blocks apart were rendered safe at the scene, officials said. Other devices were determined to be nonfunctional.

Investigators recovered from Jabbar’s rental truck a transmitter intended to trigger the two bombs, the FBI said in a statement Friday. It also said authorities found bomb-making materials at the New Orleans home Jabbar rented prior to the attack. Jabbar tried to burn the house down by setting a small fire in a hallway and placing accelerants to help spread it, the FBI said. The flames burned out before firefighters arrived.

Authorities on Friday were still investigating Jabbar’s motives and how he carried out the attack. They say he exited the crashed truck wearing a ballistic vest and helmet and fired at police, wounding at least two officers before he was fatally shot by officers returning fire.

New Orleans police declined to say Friday how many shots were fired by Jabbar and police, and whether any bystanders may have been hit, citing the active investigation.

Stella Cziment, who heads the city’s civilian-run Office of the Independent Police Monitor, said investigators are working to account for “every single bullet that was fired” and whether any of them struck bystanders.

Bourbon Street was solemn Friday. A day after the crime scene reopened to the public, locals and tourists stopped to pay respects to victims of the attack as the sound of bucket drums echoed. People shed tears while gathering at a growing memorial. Some left flowers and candles while others dropped to their knees to say a quick prayer.

“New Orleans is about having a good time, you know, just trying to live your best life,” said Tony Lightfoot, who works in Baton Rouge and was visiting New Orleans with his son. He said the attacker “just decided to disrupt all of that.”

Thirteen people remained hospitalized. Eight people were in intensive care at University Medical Center New Orleans, spokesperson Carolina Giepert said.

The White House said President Joe Biden would travel to New Orleans next week. The president and first lady planned to visit Monday to “grieve with the families and community members impacted by the tragic attack.”

Police used multiple vehicles and barricades on Friday to block traffic at Bourbon and Canal streets as crowds of pedestrians swelled. Other law enforcement agencies helped city officers provide extra security, said Reese Harper, a spokesperson for the New Orleans Police Department.

The first parade of the Carnival season leading up to Mardi Gras was scheduled to take place Monday. New Orleans will also host the Super Bowl on Feb. 9.

“This enhanced safety effort will continue daily, not just during large events,” Harper said in a statement.

In a previous effort to protect the French Quarter, the city had installed steel columns known as bollards to restrict vehicle access to Bourbon Street. The posts retracted to allow for deliveries to bars and restaurants, until — gummed up by Mardi Gras beads, beer and other detritus — they stopped working reliably.

So when New Year’s Eve arrived, the bollards were gone. They were being replaced ahead of the Super Bowl.

Meanwhile, New Orleans City Council President Helena Moreno took steps toward launching an investigation of the attack. In a memo to another council member obtained by AP, Moreno said she was initiating the creation of a local and state legislative committee “dedicated to reviewing the incident and its implications.”

“This committee will play a crucial role in assessing our current policies, enhancing security measures, and ensuring that we are adequately prepared to respond to any future threats,” Moreno wrote.

The FBI concluded Jabbar was not aided by anyone else in the attack, which killed an 18-year-old aspiring nurse, a single mother, a father of two and a former Princeton University football star, among others.

Thirteen of the 14 victims have been identified by the New Orleans coroner’s office, with the youngest listed as 18 and the oldest 63. Most of the victims were in their 20s. One victim was a British citizen, 31-year-old Edward Pettifer of west London, according to London’s Metropolitan Police.

British media reported that Pettifer was the stepson of Tiggy Legge-Bourke, who was the nanny for Prince William and Prince Harry between 1993 and 1999, which included the time after the death of their mother, Princess Diana.

It was the deadliest IS-inspired assault on U.S. soil in years, laying bare what federal officials have warned is a resurgent international terrorism threat.

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Mustian reported from Black Mountain, North Carolina. Cline reported from Baton Rouge, Louisiana. AP reporters Eric Tucker and Tara Copp in Washington; Sharon Lurye in New Orleans; Jeff Martin in Atlanta; Martha Bellisle in Seattle; Darlene Superville in New Castle, Delaware; and Russ Bynum in Savannah, Georgia, contributed to this report.