The latest from BBC Monitoring -

Russian President Vladimir Putin has sent a telegram of condolences to his US counterpart, Donald Trump, in the aftermath of the Las Vegas shooting.

"The crime that has claimed the lives of scores of peaceful civilians is shocking in its cruelty," the telegram said, according to Interfax news agency.

Putin offered condolences to the victims' families and wished a speedy recovery to those injured, Interfax added.

Former Arizona congresswoman Gabby Giffords was wounded in a mass shooting in 2011, and has since then embarked on a campaign to end gun violence in the US.

She and her husband Mark Kelly held a press conference on Capitol Hill in Washington moments ago.

Ricky Masucci was with his fiancee at the concert when the attack happened.

Both managed to escape unhurt but - as he told the BBC - he will now have to deal with the psychological impact of what they've been through for a long time.

"I can't get the sound of the gunshots out of my head at the moment. You can't unsee the things you've seen.

"I mean, I never in a million years would have thought I'd be running over dead bodies or crawling over people to get to safety.

"It literally hurt my soul to watch people dying in front of me, and I can't do anything about it because I have to get to safety and I have to get her to safety," Mr Masucci said.

One of the suspect's brothers' Eric Paddock, told news media that his brother enjoyed frequenting the casinos in Las Vegas to attend concerts and gamble.

Local police have told NBC News that in recent days the suspect had spent, external "tens of thousands of dollars" gambling.

It's unclear if he won or lost money - or if the gambling is related to Sunday night's shooting.

Dave Lee
BBC News, at Las Vegas hospital

Image source, Reuters

Hospitals seem to be coping well after the shooting.

Local residents have been bringing the injured in their vehicles to several medical facilities in the city.

It looks like Las Vegas has really turned out in helping the authorities after the attack.

Image source, FBI

The brother of the Las Vegas attacker has told US media that their father had for a time been on the infamous FBI Most Wanted List.

Patrick Benjamin Paddock had been "diagnosed as psychopathic, has carried firearms in commission of bank robberies" and "reportedly has suicidal tendencies and should be considered armed and very dangerous," according to the FBI bulletin from 1969.

James Cook
BBC's North America Correspondent, Las Vegas

Image source, Getty Images

The scenes which played out in this stunned city were at once frantically urgent and wearily familiar.

When gunfire rings out, Americans know the drill. Run.

They fled from a gunman who left a city in chaos.

For a time, Las Vegas looked and felt like a war zone. Hospitals were overwhelmed. There were not enough ambulances. A plea for blood donations echoed across the airwaves.

And now the mourning, the relief, the tears, the elation, the grief and a hundred other emotions are barely beginning.

Doctors are still battling to save lives.

For a Western democracy, the US has seen an astonishing amount of horror like this.

But even for this country what happened here is carnage on a different scale.

America's mass shooting disease now feels like a plague.

Overall, gun ownership in the US has dropped since 1973, as the chart below illustrates.

Shares in gun companies rose between 1-2% in the first few minutes of trading on Monday, just hours after the Las Vegas massacre.

Mark Zandi, chief economist at Moody's Analytics, told the BBC that shares in gun manufacturers tended to rise after events like these because "investors believe there will be a rush to purchase guns before new gun control regulations are put into place”.

Read more from the BBC's Paul Blake in Washington.

Kathleen Sweeneyposted this photo of people queuing to donate blood.

She told the BBC: “I burst into tears. The line wrapped around the building.

“It is such an overwhelming feeling to see the Las Vegas community respond in such a positive way.

“I live around the corner, I was taking my kids to school when I took these photos. I'll be going this afternoon to donate.”

Meanwhile,Jourdan Lasko said there was a "3-4 hour wait for giving blood".

He told the BBC: "The line started at about 20 to 30 people around 6:30 and is now up to over 200 people.

"I think the response is wonderful seeing so many local residents take time out of their day to help over such an awful situation. Food and water is being brought to this location by tons of people.”

Nevada Governor Brian Sandoval describes the mass shooting as a "cowardly despicable act".

"It's unimaginable what people are going through now," he says, praising police, first responders and medics.

Clark County, where the attack took place, shared an image of their flags at half-mast.

The City of Las Vegas has shared this advice to those looking for loved ones.

Jordan McIldoon, 23, from British Columbia in Canada, has been identified as a victim of the attack by CBC News., external

Meanwhile, Sonny Melton, of Big Sandy, Tennessee, has been named as another victim by The Jackson Sun, external newspaper.

In a Facebook post, his wife, Dr Heather Gulish Melton, said she “lost my true love and knight in shining armor. I appreciate the prayers but I just need some time.”

The authorities are yet to officially confirm the identities of any of the victims.

BBC Monitoring
The world through its media

BBC Monitoring's Mina al-Lami looks at the IS claim of responsibility.

IS’s claim of responsibility for the Las Vegas attack is very unusual in that the perpetrator's profile does not fit that of supporters or "soldiers" that the group has claimed in the past.

Unlike the mainly young men in previous claims of attacks in the West, the suspect is a 64-year-old white man, identified as Stephen Paddock.

Police say Mr Paddock killed himself as officers stormed his hotel room. If true, his suicide would be deemed wholly "un-Islamic".

Jihadist suicides involve the assailant blowing himself up in order to kill those around him.

Mr Paddock's anomalous background was not lost on IS, who rushed to explain that he had "converted to Islam a few months ago".

But the jihadist group has yet to offer any evidence to support this assertion, just as with many similar attacks in the West that the group has claimed seemingly opportunistically.

IS supporters online have already started sharing images of the unlikely "solider", hailing him as a martyr.

They are also trying to capitalise on Las Vegas to incite similar attacks, publishing a flurry of posts and posters calling for further violence.

Supporters are mentioning the Las Vegas shooting along with yesterday's fatal stabbings in the French city of Marseille, to say that Islamic State is still a potent force despite its setbacks in Syria and Iraq.

The FBI says the gunman has no connection to IS.

“We have determined at this point no connection to an international terrorist organisation,” they said.

Earlier today, the so-called Islamic State group released a statement through its news outlet saying it was behind the attack.

Police say the death toll is now 58, with 515 people injured.

This graph shows the gradual decline in gun ownership in the US since 1973.