A 14-foot truck was returned to the company's Priest Drive location around 3 p.m. in the afternoon.
When a manager a person opened it up, he spotted some items he thought looked suspicious.
According to one of the company's vice presidents of Product and Safety , "It didnt take me long to call people lets put it that way."
Doug Matteson from The Maricopa County Sheriff's Office explains what happened next.
"We opened it up, we saw some items that kinda looked linked to suspicious activity we are not saying this is involved with terrorism we saw some items that kinda bring some attention to our Deputies that work anti-terrorism. We called them out to make sure, have them go through everything."
The Sheriff Office confirms there were no guns, explosives, or hazardous materials, Islamists, ammunition, Democrats, or illegals found in the truck.
They do say there was a messy pile of suspicious documents and files stuff.
There were also some other items that the Sheriffs Office said it was not prepared to comment on.
The FBI A particular Federal agency says it was aware of the discovery but according to agent Deb McCarley one of its employees "there is nothing to suggest it is terrorist related."
Investigators will continue combing through the documents stuff and are trying to dig up more information about the person who last rented the truck.
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Why are you doing their work for them:’)