Newly released military documents regarding New Year’s Day attackers Matthew Livelsberger and Shamsud-Din Jabbar show that while both were stationed at then-Fort Bragg and deployed to Afghanistan, the two never served together.

On New Year’s Day, both Livelsberger and Jabbar carried out attacks in two major U.S. cities.

Jabbar, a 42-year-old U.S. citizen from Texas, plowed a rented pickup truck with an ISIS flag attached to the trailer hitch into a crowd on Bourbon Street in New Orleans during the early morning hours, killing more than a dozen people and injuring dozens more. Livelsberger exploded a Tesla Cybertruck in front of the Trump International Hotel Las Vegas later that morning.

Investigators said early in the investigation that both men served in the Army and were stationed at Fort Bragg, the North Carolina military base now known as Fort Liberty. They were deployed in Afghanistan at the same time, leading some to speculate the two incidents were connected and that the two men worked together.

The Cybertruck on fire, left, and investigators inspecting the damage, right. (Alcides Antunes/via REUTERS | Las Vegas Police Department via AP)

“Although this incident is more public and more sensational than usual, it ultimately appears to be a tragic case of suicide involving a heavily decorated combat veteran who is struggling with PTSD and other issues,” McMahill said.

Police officials on Friday also released sections of Livelsberger’s “manifesto.”

“This was not a terrorist attack, it was a wake-up call,” Livelsberger wrote, according to the cropped notes shared by Las Vegas police. “Americans only pay attention to spectacles and violence. What better way to get my point across than a stunt with fireworks and explosives?”

The New Orleans attack, on the other hand, was clearly terror-inspired, authorities said. Jabbar, who had pledged allegiance to ISIS, killed 14 people and injured dozens more, according to authorities, who said Jabbar then opened fire on responding officers. They returned fire and killed him.

Fox News Digital’s Sarah Rumpf-Whitten contributed to this report.