Lombardo says his department is working on helping people who attended Sunday night's concert get personal items back that were left at the scene.
Authorities said Paddock killed 59 people and injured another 527 early Monday in the deadliest mass shooting in modern us history.
The tanks sit on property owned by McCarran International Airport.
Danley went on to say that Paddock told her he'd found a "cheap" ticket to her native Philippines roughly two weeks prior to Sunday's event and persuaded her to leave the country to visit her family.
Speaking yesterday, Paddock's brother described him as as a keen gambler who had no known political or religious agenda.
One week earlier, he had rented an apartment overlooking another open-air music festival in downtown Las Vegas. "'I'm paying for your drink, just like I'm paying for you'".
The authorities investigating the Las Vegas shooting have turned to the shooter's girlfriend, Marilou Danley, hoping to get clues about the gunman Stephen Paddock's motives and what may have sparked the deadliest mass shooting in modern USA history. Police said the murderer was Stephen Craig Paddock, 64, of Mesquite, Nev.
"It never occurred to me in any way whatsoever that he was planning violence against anyone", she said.
"There are reports her ID was used for booking the hotel or some such detail".
An unidentified acquaintance of Danley who was reached by the Reno Gazette-Journal said, "She had nothing to do with this psycho".
The shooter was on the 32nd floor of the Mandalay Bay hotel when he smashed a window and shot at concert goers at the Route 91 country music festival. Paddock was using her identification leading up to the shooting.
Police found 23 guns in Paddock's hotel room and another 19 in his home in a retirement community in Mesquite, Nevada.
The Philippines' National Bureau of Investigation (NBI) said the FBI, its United States counterpart, had sought help in finding Danley, 62. He said the University does not now plan to release a statement on the attack but supports a comment made by Chancellor William McRaven on Monday morning via Twitter.