Concert goers were told “You’re all going to f***ing die” less than an hour before the Las Vegas shooting started, it has been claimed.

A woman in the crowd is said to have yelled the warning about 45 minutes before the Route 91 Harvest festival became the venue for the worst mass shooting in US history.

After her outburst, it was claimed, the woman and her male companion were made to leave the venue by security.

Less than an hour later, an attack began that left at least 50 people dead.

Witness Brianna Hendricks, said the woman had been behaving strangely before her outburst.

Ms Hendricks, who had been in Vegas to celebrate her 21st birthday, told Mail Online: “There was a lady who came running up behind us in the concert and she started to play with people's hair, acting crazy, and she told us that we're all going to f***ing die.

“She said they're all around us and we were going to die.”

Las Vegas shooting – in pictures Show all 15 1 /15 Las Vegas shooting – in pictures Las Vegas shooting – in pictures People scramble for shelter at the Route 91 Harvest country music festival after gun fire was heard Getty Las Vegas shooting – in pictures People carry a person at the Route 91 Harvest country music festival after shots were fired David Becker/Getty Las Vegas shooting – in pictures People run from the Route 91 Harvest country music festival after gun fire was heard David Becker/Getty Las Vegas shooting – in pictures A handout photo released via Twitter by Eiki Hrafnsson (@EirikurH) showing concertgoers running away from the scene (C) after shots range out at the Route 91 Harvest festival on Las Vegas Boulevard EPA/Eiki Hrafnsson Las Vegas shooting – in pictures People lie on the ground at the Route 91 Harvest country music festival after hearing gun fire Getty Las Vegas shooting – in pictures A man in a wheelchair is taken away from the Route 91 Harvest country music festival after hearing gun fire David Becker/Getty Las Vegas shooting – in pictures People stand on the street outside the Mandalay Bay hotel near the scene of the Route 91 Harvest festival on Las Vegas Boulevard EPA/Paul Buck Las Vegas shooting – in pictures FBI agents confer in front of the Tropicana hotel-casino after a mass shooting during a music festival on the Las Vegas Strip Reuters/Las Vegas Sun/Steve Marcus Las Vegas shooting – in pictures Las Vegas police run by a banner on the fence at the Route 91 Harvest country music festival grounds after shots were fired David Becker/Getty Las Vegas shooting – in pictures An injured person is tended to in the intersection of Tropicana Ave. and Las Vegas Boulevard after a mass shooting at a country music festival Ethan Miller/Getty Las Vegas shooting – in pictures Metro Police officers pass by the front of the Tropicana hotel-casino after a mass shooting at a music festival on the Las Vegas Strip Reuters/Las Vegas Sun/Steve Marcus Las Vegas shooting – in pictures A woman sits on a curb at the scene of a shooting outside of a music festival along the Las Vegas Strip AP/John Locher Las Vegas shooting – in pictures A cowboy hat lays in the street after shots were fired near a country music festival in Las Vegas Getty Las Vegas shooting – in pictures Las Vegas Metro Police and medical workers stage in the intersection of Tropicana Avenue and Las Vegas Boulevard South after a mass shooting at a music festival on the Las Vegas Strip Reuters/Las Vegas Sun/Steve Marcus Las Vegas shooting – in pictures Sheriff Joe Lombardo (2-R) speaking during a press briefing in the aftermath of the active shooter incident on Las Vegas Boulevard EPA

Ms Hendricks said the woman had claimed her boyfriend could not breathe in order to push her way through the crowd to the front row.

She said: “It seemed she was telling us to either warn us, or she was part of it and she was telling us because she knew we were going to die. It was so scary.

“It felt like she had knowledge of what was about to happen.”

Ms Hendricks returned to the Mandalay hotel about 15 minutes before the shooting, and witnessed the subsequent carnage from her hotel room.

“It makes me feel uncomfortable,” said Ms Hendricks. “I thought it [the woman’s warning] had a correlation [to the shooting].”

She described the woman who gave the warning as “Hispanic, probably about 5ft 5, [with] brown hair”, and said the woman’s boyfriend was also Hispanic.

The authorities have yet to comment on whether the woman’s warning was just a bizarre coincidence, or whether it actually did have something to do with the mass shooting.

After the suspected gunman Stephen Paddock, a 64-year-old white man, was confirmed dead, police said they had also located a woman connected with him, Marilou Danley.

When appealing for information to help locate Ms Danley, police had described her as 62 years old, Asian, 4 foot 11 inches tall and weighing 111 pounds (50 kg).

Clark County Sheriff Joseph Lombardo later revealed that Ms Danley was in fact out of the country and was not believed to have been involved in the shooting.

He told reporters: "We have located her out of the country. She was not with him [Paddock] when he checked in [to his Mandalay Bay hotel room]. We have discovered he was using some of her identification.