Las Vegas: Investigators worked feverishly on Tuesday to find out why a retired accountant gunned down at least 59 people and wounded over 500 others at an open-air concert in Las Vegas, raking the crowd with bullets from a 32nd-floor hotel room packed with weapons.
As America grappled with the deadliest mass shooting in its history, officials reacted cautiously to an Islamic State group claim that Stephen Craig Paddock, 64, had carried out Sunday night's massacre on behalf of the jihadist group.
Police said Paddock, who had no criminal record, smashed windows in his hotel room shortly after 10 pm on Sunday and trained bursts of automatic weapons fire on thousands of people attending a country music concert down below.
In footage of the massacre broadcast on CNN, the sustained rattle of gunfire is heard as people scream and bolt for cover with little idea of where the shots were coming from.
"We saw bodies down. We didn't know if they had fallen or had been shot," said Ralph Rodriguez, an IT consultant from Pomona Valley near Los Angeles, who was at the concert with a group of friends.
"People started grabbing their loved-ones and just strangers, and trying to help them get out of the way," he said.
In a statement on online, Islamic State claimed Paddock was one of its "soldiers" but the FBI said it had found no such connection so far with the local sheriff describing him as a lone "psychopath."
Sheriff Joseph Lombardo said Paddock fired through the door of his hotel room and hit a security guard in the leg.
But when a SWAT team stormed the room where Paddock had been staying since 28 September, they found he had killed himself.
Inside the room were 23 firearms including automatic weapons, he said.
Investigators also found another 19 firearms along with explosives and several thousand rounds of ammo at Paddock's house in Mesquite, Nevada, some 130 km away.
Lombardo said they had discovered several pounds of an explosive called tannerite at the house as well as ammonium nitrate, a type of fertiliser, in his car.
He said the death toll had risen to 59, with another 527 people wounded.
But the gunman's motive remains unclear.
"We're hunting down and tracing every single clue that we can get on his background," the sheriff said at a late-night briefing.
So far, investigators had found no manifesto or anything else to explain Paddock's actions, he said.
"This individual is a lone wolf and I don't know how it could have been prevented," he said earlier.
"I can't get into the mind of a psychopath at this point."
As the investigation continued, details started to emerge in the media about some of the victims — a kindergarten teacher from California who married her childhood sweetheart; a Tennessee nurse; a high school secretary from New Mexico and a cheerleader, also from California.
Monday night, there were vigils of solidarity with the dead and the wounded.
The Empire State Building went dark, as did the Eiffel Tower — and much of the Las Vegas strip itself.
President Donald Trump denounced what he called "an act of pure evil" and said he would visit Las Vegas on Wednesday.
But the White House pushed back at calls to reopen the US debate on tighter gun controls.
"A motive is yet to be determined and it would be premature for us to discuss policy when we don't fully know all of the facts or what took place last night," Trump's spokeswoman Sarah Sanders said.
Lombardo said Paddock had apparently used some kind of hammer to smash the window of his hotel room before opening fire on the crowd of some 22,000 people.
Islamic State, which provided no evidence for its claims, described him as a "soldier of the caliphate" saying he converted to Islam several months ago and went by the name Abu Abdel Bar al-Amriki — "The American."
But the Federal Bureau of Investigation said it had found no such link so far. "We have determined to this point no connection with an international terrorist group," FBI special agent Aaron Rouse said.
CIA spokesman Jonathan Liu said the intelligence community was aware of the claim but advised "caution on jumping to conclusions before the facts are in."
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Updated Date: Oct 03, 2017 18:50:24 IST