Also found were two "bump stocks", devices added to semi-automatic guns that mimic the rapid fire of fully automatic weapons, according to two USA officials briefed by law enforcement who spoke on condition of anonymity because the investigation was still unfolding.
But as yet, no clear reason for the killing has emerged.
Police have also found no links to any foreign or domestic terrorist organisations. Paddock is much older than the typical shooter and was not known to be suffering from mental illness.
The shooting - the worst in modern U.S. history - has sparked debate over USA gun laws, but President Donald Trump however said the discussion was "not for now". They raised her daughter from Danley's previous relationship and she became an Australian citizen.
"We have a tragedy", Mr. Trump replied.
What do we know of the gunman?The bomb-making chemical ammonium nitrate was also found in his vehicle.
In total, law enforcement found 42 firearms that belonged to the perpetrator of the massacre at Las Vegas (Nevada).
Discerning Paddock's motive has proven especially baffling given the absence of the indicators typical in other mass shootings. But it's unfair to say leads pursued by reporters are completely off.
But the group provided no evidence for this and has made unsubstantiated claims in the past.
One sister told Seven News said that Danley didn't know anything ahead of the shooting. His motive remains unclear and the Federal Bureau of Investigation did not find any connection with an worldwide terrorist group.
How did the attack unfold?
The country superstar was onstage performing at the Route 91 Harvest music festival when the gunfire began. Reportedly, the pictures were taken from the hotel room.
"The investigation with her is ongoing, and we anticipate some information from her shortly", Lombardo said. Reviewers have reported that the product permits a shooter to go through hundreds of rounds every minute. His noticeably distraught brother who lives in Orlando said there was no indication Paddock was planning or was capable of that sort of attack. "I loved him and hoped for a quiet future together with him".
"People were running and there was chaos". Authorities believe he killed himself. But many have been identified by family members and in local media.
Police also say Paddock may have planned to escape the scene.
What gun laws does Nevada have?Investigators questioned her about Paddock's weapons purchases, a $100,000 wire transfer to a Philippine bank that appeared to be intended for her, and whether she saw any changes in his behavior before she left the United States.
People are allowed to carry weapons and do not have to register themselves as gun owners.
What kinds of guns were they?
In a televised address, President Donald Trump described the shooting as an "act of pure evil", but did not make reference to a growing row over Americans' right to bear arms. She was travelling in the Philippines at the time of the shooting.