Country turned pop superstar revealed she felt helpness in tweet.
Investigators struggle to explain reasoning behind Las Vegas massacre which left at least 59 people dead
Nevada has some of the most relaxed gun laws in the US.
Tech companies have come under intense scrutiny over fake news, terrorism and harassment posts on their sites.
Benjamin Hoskins Paddock had been convicted of bank robbery, auto theft and a confidence scam, and he had escaped from a Texas prison in 1960.
Press secretary Sarah Huckabee Sanders maintained that President Trump is a strong supporter of the Second Amendment.
Shares of major weapons manufacturers rallied by more than 4% after the attack.
Paddock may be the deadliest mass shooter in modern US history but he is not the oldest.
Thousands fled as Paddock shot round after round from 32nd floor of Mandalay Bay hotel.
The president said that he would be visiting Las Vegas on Wednesday.
Anti-terrorism experts argue such claims are not reliable and are a propaganda tool.
Police believe Stephen Paddock was the lone gunman behind Sunday night's attack.
At least 50 people killed and hundreds injured when man opened fire on concertgoers on 1 October.
Viewers took to Twitter in fury after pop diva was caught off guard by Piers Morgan.
More than 50 people were killed with a further 200 injured in the late-night attack.
Showbiz world react to massacre at Route 91 Harvest music festival in which more than 50 reported dead.
Over 50 killed and 406 injured after Stephen Paddock fired on the Route 91 Harvest country music festival.
At least 50 people killed and 200 injured in attack near Mandalay Bay Hotel and Casino.
58 concert-goers killed and more than 500 were injured in the attack.
20 killed and more than 100 injured after gunman opened fire.
The main suspect is dead, but police have ruled out any involvement from Danley.
David Becker, a photojournalist covering the country music festival in Las Vegas for Getty Images, braved machine gun fire to take photos of the mass shooting.
