Further gunshots followed and the band ran off stage.

A Las Vegas Metropolitan Police officer stands in the intersection of Las Vegas Boulevard and Tropicana Ave.

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Law enforcement authorities discovered a cache of at least 18 other firearms in the shooter's hotel room where he fired upon those below.

Another 18 firearms were retrieved from the suspect's house, authorities said late Monday.

The number of dead surpassed the death toll in the June 12, 2016, rampage at the Pulse gay nightclub in Orlando, where 49 people were slain.

Police said among the injured were two on-duty officers.

Jon Bessett, one of the concert attendees, described the scenes as "pandemonium." He told NBC News that around 10 p.m.

Sunday, he heard gunshots but country music star Jason Aldean and his band continued playing."We have determined to this point no connection with an international terrorist group," the FBI said."We will continue to work with our partners to ensure that this is factually, thoroughly and absolutely investigated to be able to bring comfort and peace back to this community." Police told The Wall Street Journal that the shooter appears to have used a fully automatic rifle.One was in stable condition after surgery and the other sustained minor injuries.Lombardo also said reports on social media that there were multiple shooters and explosives used were false.Paddock was utilizing some of her identification, Lombardo said, adding that police "have had a conversation with her," and that she was not believed to have been involved "at this time." During the shooting, police told people to avoid heading to the south end of the Strip and said it was investigating an active shooter.