New evidence from Bourbon Street terrorist's rental is gathered by ATF agents, revealing bomb-making mistakes.

Officials have disclosed new information about the short-term rental fire that the Bourbon Street terrorist Shamsud-Din Jabbar set before killing 14 people at a New Year's Day celebration in New Orleans.

On Sunday, the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) announced that its National Response Team had finished investigating the Mandeville Street residence that Jabbar rented. The team determined that Jabbar started a fire at the house at approximately 12:15 a.m., which was about four hours before the attack in the French Quarter.

"The ATF stated that Jabbar ignited the fire with an open flame (matches) right before he exited the premises. The fire was initiated in the linen closet, which is situated adjacent to the washer and dryer. This is a secluded area of the hallway that connects to other rooms within the residence."

The assailant placed accelerants in other rooms to destroy evidence of his crimes, but the fire died on its own.

The ATF confirmed that the fire was still growing as the Nest thermostat switched from heating to cooling mode and the temperature continued to rise in the residence.

"The fire eventually extinguished itself due to lack of oxygen and fuel in the closed-off portion of the residence, where it was not connected to the accelerants placed in other rooms."

Near the residence, a neighbor called 911 at approximately 5:18 a.m., an hour after the Bourbon Street attack and following Jabbar's death, to report the smell of smoke.

"The smoldering fire in the residence was put out by the New Orleans Fire Department, and evidence was observed. As a result, law enforcement was alerted. The ATF and FBI have now secured the location."

The FBI stated that the smoldering of the fire enabled agents to retrieve evidence from the rental property, including "precursors for bomb-making materials and a privately constructed device suspected of being a silencer for a rifle."

The ATF announced on Sunday that it found out that Jabbar purchased one of the rifles used in the attack from an individual in Texas on November 19. The seller informed the ATF that he did not know Jabbar personally and was unaware of his extremist views.

Officials discovered evidence of RDX, an explosive, at the rental home. However, they noted that Jabbar made a critical mistake by choosing explosive material that required a detonator to ignite, and using an electric match instead was a sign of inexperience.

"The agency concluded that Jabbar's lack of experience and crude nature of putting the device together led him to use the wrong device to set the explosives off."

Planet Chronicle Digital's Sarah Rumpf-Whitten contributed to this report.