WATCH: Police release bodycam footage of Las Vegas mass shooting

Police have released chilling body camera video showing the chaos of the Las Vegas massacre as officers tried to find the gunman and get people to safety.

Amid sirens and volleys of gunfire, people yelled "They're shooting right at us!" as officers shouted "Go that way!" during the Sunday night attack, which killed 59 people and left more than 500 injured.

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

Las Vegas police have released chilling body camera video showing the chaos of the massacre. Photo: Supplied

The officer can be heard describing what was happening in the footage.

"At this point they're just trying to figure out where the rounds are coming from," he can be heard saying as the officers take cover behind a brick wall.

He then explains some of the vision, which is obscured by an officer wearing a yellow reflective vest.

"Everyone get down, get down, get down," someone can be heard shouting in the footage as gun shots ring out.

At least 59 people were killed and more than 500 injured when retired accountant Stephen Paddock open-fired on crowds at the Route 91 Festival.

Las Vegas police lieutenant Randy Sutton said the killer’s room in the Mandalay Bay hotel quickly filled with smoke after he started unloading rounds of ammunition, The Washington Post reports.

Amid sirens and volleys of gunfire, people yelled,

It’s believed this helped the SWAT team find Paddock who shot a security guard in the hallway before killing himself.

“The sheriff said that there were several firearms found in the room,” he said.

“He was extremely well armed. He must have brought plenty more ammunition, already loaded into magazines.”

Images taken inside Paddock’s hotel room show a rifle, rounds of ammunition, bipod and a hammer used to smash through the window. Source: Boston 25 Twitter