People run from the Route 91 Harvest country music festival after apparent gunfire was heard in Las Vegas on Oct. 1, 2017.
People run from the Route 91 Harvest country music festival after apparent gunfire was heard in Las Vegas on Oct. 1, 2017.David Becker—Getty Images
People run from the Route 91 Harvest country music festival after apparent gunfire was heard in Las Vegas on Oct. 1, 2017.
Reported Shooting At Mandalay Bay In Las Vegas
Reported Shooting At Mandalay Bay In Las Vegas
Warning: many of the following images are graphic in nature and will be disturbing to some viewers.
Victims of a shooting at the Route 91 Harvest country music festival in Las Vegas on Oct. 1, 2017.
Reported Shooting At Mandalay Bay In Las Vegas
Reported Shooting At Mandalay Bay In Las Vegas
Reported Shooting At Mandalay Bay In Las Vegas
Las Vegas, Shooting, MandalayBay
Reported Shooting At Mandalay Bay In Las Vegas
Las Vegas, Shooting, Mandalay Bay, Photo
A body is covered with a sheet in the intersection of Tropicana Avenue and Las Vegas Boulevard South after a mass shooting at a music festival on the Las Vegas Strip in Las Vegas
Reported Shooting At Mandalay Bay In Las Vegas
Shooting, Las Vegas, USA - 02 Oct 2017
Shooting, Las Vegas, USA - 02 Oct 2017
Shooting, Las Vegas, USA - 02 Oct 2017
People run from the Route 91 Harvest country music festival after apparent gunfire was heard in Las Vegas on Oct. 1, 201
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David Becker—Getty Images
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'It Just Kept Coming.' Photos Show Panic and Chaos as Las Vegas Shooting Unfolded

Updated: Oct 02, 2017 6:56 PM ET

At least 58 people were killed and at least another 515 injured Sunday in a mass shooting at the Route 91 Harvest Festival outside the Mandalay Bay in Las Vegas. The death toll makes the assault the deadliest mass shooting in modern U.S. history, overtaking last year's attack on the Pulse nightclub in Orlando, Fla.

A gunman later identified by police as Stephen Paddock, 64, opened fire on the Route 91 Harvest Festival from the 32nd floor of the Mandalay Bay Resort and Casino, authorities said. Paddock was later killed in an encounter with law enforcement.

"It just kept coming," Robyn Webb, who was attending the concert, told the Las Vegas Review-Journal. "It was relentless."

Country music star Jason Aldean, who was on stage when the attack began, called the assault "beyond horrific."

"It hurts my heart that this would happen to anyone who was just coming out to enjoy what should have been a fun night," Aldean said in an Instagram post.

See photos from the chilling aftermath of the shooting above.

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