
Las Vegas investigators have given more details about the deadliest shooting in modern US history as they described how the gunman opened fire on airport fuel tanks and on police officers arriving at the massacre.

Las Vegas authorities are standing by their timeline of the deadliest shooting in modern US history despite it being disputed by the hotel where the gunman opened fire.

Mandalay Bay hotel staff did not notify Las Vegas police about a shooting in a hallway until after Stephen Paddock opened fire on the crowd outside at a country music festival, a federal official said.

The hotel where the Las Vegas gunman was staying when he launched his deadly attack has cast doubt on a revised timeline of events set out by investigators.

Police have made a significant change to the timeline of the Las Vegas mass shooting, saying the gunman shot a hotel security guard before he opened fire on concert-goers.

Police have made a significant change to the timeline of the Las Vegas mass shooting, saying the gunman shot a hotel security guard before he opened fire on concertgoers.

Investigators have met the brother of the Las Vegas gunman while friends and relatives of the 58 killed and other concert-goers returned to the scene to reclaim shoes, phones and bags left behind in the panic as they fled.

The brother of a man who killed dozens of people at a Las Vegas country music festival has arrived in Nevada to help investigators work out the gunman's motives and to retrieve the body.

A note has been found in the Las Vegas gunman's hotel room, showing calculations of where to aim to maximise casualties.

Police investigating the Las Vegas mass shooting have said they are still no closer to working out what drove Stephen Paddock to commit mass murder.

Investigators still have not found a motive for the Las Vegas shooting rampage that killed 58 people, Undersheriff Kevin McMahill has said.

Latest: A US coroner has released the names of all 58 victims of the Las Vegas shooting last week.

Investigators are looking into whether gunman Stephen Paddock scoped out bigger music festivals before shooting scores of country music fans in Las Vegas.

The "bump stocks" device that the Las Vegas gunman used to turn semi-automatic rifles into fully automated weapons should be "subject to additional regulations", the National Rifle Association has said.

Latest:The Las Vegas gunman who killed 58 people in the deadliest mass shooting in modern US history stockpiled weapons and ammunition over decades.

Senior Republicans are open to considering legislation banning "bump stocks" like the gunman in Las Vegas apparently used to effectively convert semi-automatic rifles into fully automated weapons.

New York City Police Commissioner James O'Neill said: "We do understand that no city or town in this country is completely immune to such unbridled hatred."

Natalie Vanderstay was shot in the stomach and had her leg ripped apart by shrapnel.

Through tearful stories of last moments together and in heart-wrenching tributes, relatives and friends have been remembering the dozens of people killed in the shooting massacre on the Las Vegas strip.

LATEST: As he prepared to travel to Las Vegas, Donald Trump said it was a "sad day".