FIFTY dead and 200 injured as gunman with terrifying arsenal of weapons opens fire on packed Vegas music festival from 32nd floor of Mandalay Bay hotel: Shooter killed and 'companion' caught

• WARNING: GRAPHIC CONTENT 
• At least 50 people have been killed and more than 200 injured after a shooting at the Route 91 Harvest Festival in Las Vegas, Nevada
• The shooter has been identified as Stephen Paddock, 64, who opened fire from a 32nd floor room of Mandalay Bay Hotel after 10pm Sunday night
• Officers said Paddock was shot dead inside his hotel room alongside an 'arsenal' of weapons
• Cops have located Marilou Danley, described as Paddock's 'companion' and roommate, for questioning, but say they don't believe she was involved in theshooting  
• It's the deadliest shooting in U.S. history - eclipsing last year's massacre at Pulse nightclub in Orlando, Florida 

America is reeling from the worst mass shooting in its history after at least 50 people were killed and more than 200 wounded at a country music festival in Las Vegas on Sunday night.

Police say the shooter was 64-year-old Stephen Paddock, a resident of nearby Mesquite, Nevada, who opened fire on the Route 91 Harvest Festival in Las Vegas Village from a room across the street in the Mandalay Bay Hotel shortly after 10pm.

Officers say Paddock was shot and killed after they breached a room in the hotel, where he had stashed an 'arsenal' of weapons used during the massacre.

Investigators are now raiding the Mesquite home he shared with Marilou Danley, described as his 'companion'. Police located Danley early Monday morning. They initially called her a person of interest, but now say they don't believe she was involved in the shooting.  

Sheriff Joseph Lombardo, of the Las Vegas Metropolitan Police Department, said investigations are still ongoing and police have not yet determined a motive. 

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 of the officers was critically injured, but is now in stable condition after undergoing surgery. The other officer suffered minor injuries. Neither have been identified.  All of the ambulances in the area were been deployed to the location, and victims taken to two hospitals. 

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