This is the moment police closed in on the Las Vegas shooter and blew off the door to his hotel room 72 minutes after he started opening fire on country music festival revelers, killing 59 and injuring more than 527.

Stephen Paddock, 64, opened fire on the Route 91 Harvest Festival in Las Vegas Village from a room across the street in the Mandalay Bay Hotel at 10.08pm on Sunday.

It took police one hour and 12 minutes to locate Paddock in his hotel room on the 32nd floor after they received the first 911 call. Authorities say Paddock, who had been holed up in the room for several days, killed himself before officers breached the room at 11.20pm.

Officers found him among an 'arsenal' of weapons and ammunition, including as many as 19 guns - among them AR-15 and AK-47-type assault rifles.

Police found 18 more guns, explosives and several thousand rounds of ammo in the killer's Mesquite, Nevada home.

Moments before SWAT teams closed in on Paddock, officers could be heard on an audio recording warning others to get back in the hallway on the 32nd floor so they could breach his room.

Two broken windows on the 32nd floor of the Mandalay Bay Hotel could be clearly seen from the Route 91 Harvest stage on Monday morning in the aftermath of the deadly shooting

Two broken windows could be seen on the 32nd floor on Monday morning, which is where Paddock is believed to have opened fire from

This is the view from the 32nd floor of the Mandalay Bay Hotel in an updated photo. The gunman would have had a clear view of the concert, which took place diagonally across the street where the green stage can be seen

'We have sight on the suspect's door. I need everyone in the hallway to be aware of it and get back,' a SWAT member told a dispatcher.

'We need to pop this and see if we get any further response from this guy to see if he's in here or actually moved somewhere else.'

The dispatcher can then be heard relaying the information to other nearby officers.

'All units on the 32nd floor, SWAT has explosive breach, everyone in the hallway needs to move back, all units move back,' she said.

Seconds later, an officer could be heard saying: 'Breach, breach, breach' as the SWAT team blew off the door to his room.

Officers say Paddock was found dead in the hotel room when they stormed in.

Police said at least 10 guns, including multiple rifles, were found in his hotel room. Paddock had been staying at the hotel since September 28.

Stephen Paddock (left and in an undated photo on right) opened fire on the Route 91 Harvest Festival in Las Vegas Village from a room across the street in the Mandalay Bay Hotel Sunday

Officers are seen outside the Mandalay Bay hotel where the shooter was holed up in a room on the 32nd floor

Las Vegas Police undersheriff Kevin McHaill said officers who were at the concert were able to pinpoint where the gunfire was coming from.

'They could see that the rounds were coming from that particular location as heavy fire, automatic fire at times. And so they were corralling all of the people that were actually at the concert into… behind a block wall,' he said, according to NBC.

'So a number of other officers, as the information came out, then went immediately to the Mandalay Bay and began to ascend up to that 32nd floor.

'What we know is that once we arrived up there we had isolated this individual to the two rooms and then our SWAT team used the explosive breaching to go in and confront the individual.'

Investigators are raiding Paddock's home in a retirement community in Mesquite, Nevada, which he shared with a woman named Marilou Danley.

Danley was initially named a person of interest in the shooting, but police no longer believe she was involved after contacting her early Monday morning and finding her out of the country.

Police say it appears Paddock used her ID when he checked into his hotel on September 28.

Investigations are still ongoing and police have not yet determined Paddock's motive.

People carry an injured person from the Route 91 Harvest country music festival after gunshots rang out on Sunday night

Police on guard on the streets outside the Mandalay Bay. The shooter was killed inside the hotel

People scramble over barriers to get to safety as the gunfire rages on at the Las Vegas event

This was the scene at the music festival before the assassin opened fire on the crowds of as many as 30,000 people

President Donald Trump paid his respects on Monday morning after the shooting, writing on Twitter: 'My warmest condolences and sympathies to the victims and families of the terrible Las Vegas shooting. God bless you!'

Terrifying footage from the scene shows concert-goers reacting with confusion and then panic as the festival turned into a bloodbath around them.

Video from close to the stage shows people hitting the floor as others crawl to safety or run for their lives. Audio from further back in the crowd captured several bursts of sustained automatic gunfire.

Witnesses said 'hundreds' of rounds of ammunition were emptied into the crowd, with Paddock stopping several times to reload as he carried out his massacre.

Among those shot dead at the concert were two off-duty police officers. Attendees said a large number of law enforcement and military personnel had been attending the show.

Two on-duty police officers who engaged the shooter have been hospitalized - one in critical condition, the other less-severely wounded.