As it happened: Several shot at country concert in Las Vegas

Shooting has broken out at an open-air country concert in Las Vegas on Sunday night (local time).

What we know so far:

  • At least 20 people have been killed and 100 others injured
  • The main suspect has been killed, police say
  • Las Vegas police believe there was only one shooter

This live updates article has now concluded.

10:36pm: An emotional witness has described the moment a shooting victim died in his arms, calling the attack a "terrible tragedy".

He was helping move a stranger to him into an ambulance when he died, the witness told ABC News.

"I set him down with myself and the young man passed away. It's been a tough night," he said.

"So many people died, and are wounded. It's just really sad."

10:23pm: An Australian reporter and a camera operator were forced to evacuate from the hotel where the shots were fired from.

On their way out, they were approached by a man covered in blood and begging for help.

"I had to move several bodies out of the way... F**k, multiple gunshot wounds, please," he told the reporter as he led the way back to the carnage.

10:05pm: A police officer is among those killed at a Las Vegas open-air concert.

Local police are now searching for two cars registered to the main suspect in the attack - a Hyundai Tucson and a Chrysler Pacificia, both registered in Nevada.

And a manhunt is underway for the suspected killer's roommate, Marilou Danley. Police don't think she was a second shooter, but want to question her.

9:36pm: More than 20 people have been killed and more than 100 injured in the mass shooting in Las Vegas.

The main suspect, who police say is believed to be the "sole aggressor", has been killed.

He had been firing from a room on the 32nd floor of a hotel.

A police spokesperson said they believe the shooter was a "local resident" and wouldn't speculate on his "belief system".

He said the shooter "has expired... and is no longer a threat".

9:20pm: One of the survivors of the concert attack said she thought the sound of automatic gunfire was in fact the sound of fireworks, when shooting first broke out.

Monique Dumas told the Associated Press she and her sister were watching country star Jason Aldean perform when she "[heard] a "pop, pop, pop" noise.

"Your first reaction you think it's like fireworks or firecrackers that somebody is setting off, and it happens again and you realise that it's not," she said.

Ms Dumas said the gunfire lasted around four or five minutes, as people began running for their lives.

9:11pm: A Kiwi caught up in the Las Vegas shooting told Newshub he was driving down the strip when he heard people screaming and running.

"We found out a bunch of guys... were shooting people point-blank in the face," he said.

He said they weren't sure where to go to be safe, as multiple shooters reportedly fled in different directions.

Las Vegas police currently believe there was only one shooter.

8:45pm: The number of injured has risen to 26, with 14 in a critical condition, a hospital spokesperson has confirmed.

At least two others were killed.

All had suffered gunshot wounds, the spokesperson said.

8:40pm: Las Vegas police believe there was only one shooter, who has since been taken down by officers.

It's not yet clear whether the suspect was killed or injured. Police later said they "do not believe there are any more shooters".

Witnesses had earlier reported multiple gunmen as the shooting broke out.

8:31pm: Getty photographs from the scene show the panic after gunfire broke out, leaving people ducking for cover and hiding behind cars where they could.

Bottles and bodies lie strewn across the grass at the Route 91 Harvest Festival, where only moments before, people were dancing and cheering.

As it happened: Several shot at country concert in Las Vegas
Photo credit: Getty

8:07pm: A suspicious device has been reported outside the Luxor hotel on the Las Vegas strip.

A black car was reportedly seen parked in front of the hotel, with "wires sticking out", prompting concerns it may be a bomb.

8:01pm: Police have confirmed "one suspect is down" after the shooting.

It's not yet known how many shooters there were, however witnesses have reported gunfire coming from multiple people.

Las Vegas police also reiterated their message asking for people to avoid the area.

7:51pm: At least two people have been killed and dozens of others injured in the mass shooting, a hospital spokesperson has confirmed.

Reuters reports 24 people have been injured in the attack.

7:47pm: All flights in and out of Las Vegas' main airport have been halted due to the shooting.

Originally McCarran International Airport tweeted that several flights were being diverted, but has since confirmed all flights in and out of the airport have been "temporarily halted".

7:44pm: A number of people have been taken to hospital after the shooting, but it's still not known how many people have been injured or killed.

Witnesses report seeing as many as dozens of bodies as they fled the outdoor concert.

A spokesperson for the local University Medical Center has confirmed to the Associated Press the hospital has taken in "several" people with gunshot wounds, but didn't have any more details.

7:33pm: A tourist staying at the nearby MGM Grand Hotel says he originally thought the sound of the gunfire was a helicopter flying overhead.

Twitter user StreetBeetle told Newshub a friend, who used to be in the military, "knew instantly it was an automatic weapon".

He said there's "lots of panic" and the hotel has started sending people to the basement and to their rooms.

"It still seems very nuts. The MGM is now on lockdown and everyone is crying and panicking."

7:27pm: Las Vegas police have warned people to avoid the southern end of the strip and have closed part of Las Vegas Boulevard as they investigate.

At least one of those shot was a police officer, according to reports.

7:09pm: Video has emerged of the moment gunfire broke out at the country concert.

In the video, automatic firing can be heard as the band plays. The band then breaks off as confusion begins to spread.

"Oh my God, something's happening. Get down, get down," one woman can be heard saying.

6:56pm: Concertgoers have been left in shock after the shooting.

Witnesses report seeing multiple injuries and fatalities as they fled their show.

6:45pm: Las Vegas police have confirmed they're investigating reports of an active shooter and has asked people to avoid the area.

6:32pm: Witnesses have reported multiple gunmen are firing from the Mandalay Bay Hotel and Casino, targeting those attending the Route 91 Harvest Festival nearby.

Video from the scene shows panic as people flee the shooting, with at least one person reportedly firing from a balcony.

It's unclear at this stage how many people have been injured.