What happened in Vegas — Reporter's notebook

The selection of a hotel room overlooking a music festival, days before the attack.

The latest revelation came Tuesday afternoon when police said gunman Stephen Paddock set up cameras inside his hotel suite and in the hallway.

Julie Scott, a spokesperson for United Blood Services, told ABC News that the wait is reportedly between five and six hours for people who are currently in line at any of the three donation sites in and around Las Vegas.

No one knows why Paddock morphed from a retired accountant to the deadliest mass murderer in modern US history. He said that there are uniformed security guards checking room keys prior to allowing guests to access the hotel's elevators.

The attack left 58 people dead and more than 500 injured. Among the latest: Charleston Hartfield of Nevada; Stacee Etcheber of California; Christopher Roybal of Colorado; Hannah Ahlers of California; and Jordan McIldoon of British Columbia, Canada. Only transactions where two or more handguns are sold at once appear on their radar. Stacks of ammunition magazines used in rifles can also be seen.

"It was a very terrifying and horrible experience for them", he said.

- Authorities continued processing the scene of the killings, where shoes and bags lay scattered. Police found 23 guns in the room. "You're going to be ok.' Because I truly believed it". Many bystanders used their vehicles to assist victims and transport those hurt to the hospital. "I don't think I did anything spectacular". "That's what I'm having trouble with".

Dixie GunWorx owner Chris Michel said Paddock was new to the area and visiting local gun shops.

"She ended up dying".

Trump will visit Las Vegas Wednesday, but the White House has rebuffed calls to reopen the fraught US debate on gun control in the latest atrocity's wake. He purchased the home in 2015. Some were automatic weapons or semi-automatic rifles illegally modified into machine guns.

"He had nothing to do with any political organisation and religious organizations", Eric Paddock said.

In recent weeks, Paddock made gambling transactions worth tens of thousands of dollars, although it was unclear whether they were wins or losses, NBC News reported, citing unidentified law enforcement officials.

Clark County Undersheriff Kevin McMahill said on Tuesday the shooting by gunman Stephen Paddock, 64, spanned between nine and 11 minutes.

Police say he has no known connection to terrorist organizations. The massacre happened at the end of the three-day Route 91 Harvest Festival on the Las Vegas strip during the performance of artist Jason Aldean.

Within seconds it was clear that something was very, very wrong - and audience-filmed footage shows Aldean fleeing the stage.

By early Monday afternoon, the trauma centre had received 104 patients, most with gunshot wounds. "We didn't know we lived two doors down from a lunatic". "I can tell you it's a very sick man and he was a very demented person", Trump said.

"Subsequently they approached the room, received gunfire, they backed off and SWAT responded", Lombardo said.