Investigators believe the U.S. Army veteran who drove a pickup truck into a New Orleans crowd acted alone, and they have found no link between that terrorist attack and the deadly explosion of a Tesla Cybertruck in Las Vegas that was driven by another servicemember.

“We’re confident, at this point, that there are no accomplices,” Christopher Raia, deputy assistant director of the Federal Bureau of Investigation’s counterterrorism division, said at a New Orleans news briefing hours before tens of thousands of people attended the Sugar Bowl at the Superdome.