A woman allegedly warned crowds at the Route 91 Harvest Festival that they were "all going to die" 45 minutes before the Las Vegas shooting which left at least 50 dead.
A witness said a woman and her partner pushed their way to the front of the crowd to tell people they were about to die, Sky News reported.
However the witness, identified as Brianna, claimed the pair were then escorted out of the venue. She added: "Obviously she was telling us that, either to tell us to warn us, or to tell us that we were all going to die, and she was part of it."
Brianna described the two people as roughly 5ft 5in to 5ft 6in tall and Hispanic, adding that they looked like "everyday people."
Three quarters of an hour later a gunman began firing from the 32nd floor of the neighbouring Mandalay Bay Hotel, killing at least 50 and injuring more than 200 people.
It is not yet clear whether the women who gave the warning had any prior knowledge of the subsequent massacre, which has become the deadliest mass shooting in US history/
The gunman has been named as 64-year-old Stephen Paddock. The police claim he killed himself when they stormed the hotel room.
Sheriff Joe Lombardo has called the incident a "lone wolf" attack and there is not currently any information on what the gunman’s motives were.
Isis have claimed responsibility for the shooting, suggesting that Paddock was a Muslim convert, according to the BBC. However US officials have refuted these claims.