The police shared notes from a phone used by Master Sgt. Matthew Livelsberger, who fatally shot himself inside a Cybertruck outside a Trump hotel in Las Vegas.
Turo, which investigators say was used to acquire the vehicles involved in the attack in New Orleans and explosion in Las Vegas, was emerging as an alternative car-rental service.
The F.B.I. says no connection has been found between the truck explosion outside a Trump Hotel and the truck attack that killed 14 people in New Orleans.
At least seven people were injured, the authorities said. They said they believed it to be “an isolated incident,” but had not ruled out a connection to the attack in New Orleans.