The police scanner audio begins when SWAT prepare to break into a 32nd storey hotel room after gunman Stephen Paddock opened fire on a crowd at a country festival killing at least 59 people.
"I need everybody in that hallway to be aware of it and get back," the officer tells control.
"We need to pop this and see if we get any type of response from this guy, to see if he’s in here or if he’s actually moved out to somewhere else."
Following the warning, the officer yells, "breach, breach, breach" as an explosion rattles the hotel.
In quick succession, the officer tells control the SWAT team are sweeping the rooms and find one suspect down.
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They also confirm they have found multiple firearms.
Police later told media that Paddock, a retired accountant, killed himself before a SWAT team breached his room in the Mandalay Bay hotel overlooking the venue for the country music concert.
Sheriff Joseph Lombardo said officers searching the house in Mesquite, Nevada recovered "in excess of 18 additional firearms, some explosives and several thousand rounds of ammo, along with some electronic devices we're evaluating at this point."
Consular staff from across the US are helping in the search for any Australians caught up in the deadly Las Vegas mass shooting.
No Australians have so far been identified as dead or injured but Australian authorities are working with their Canadian and British counterparts and contacting hospitals.
"We've increased our consular staff in both Los Angeles and Las Vegas. We are sending staff from our Washington embassy, experienced consular staff," Foreign Minister Julie Bishop told ABC radio on Tuesday.
With AFP.
