Updated: October 2, 2017 6:56 PM [ET] | Originally published: October 2, 2017 8:46 AM EDT ;
A t 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.
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 Police stand guard along the streets outside the the Route 91 Harvest country music festival grounds after a active shooter was reported, Oct. 1, 2017 in Las Vegas. David Becker—Getty Images People scramble for shelter at the Route 91 Harvest country music festival after a shooting, Oct. 1, 2017 in Las Vegas. David Becker—Getty Images 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. David Becker—Getty Images People carry a person after a shooting at the Route 91 Harvest country music festival after a shooting, Oct. 1, 2017 in Las Vegas. David Becker—Getty Images People flee the Route 91 Harvest country music festival grounds after apparent gun fire was heard, Oct. 1, 2017 in Las Vegas. David Becker—Getty Images A couple takes cover at the Route 91 Harvest country music festival after apparent gun fire was heard on Oct. 1, 2017 in Las Vegas. David Becker—Getty Images People assist a wounded woman at the Tropicana during an active shooter situation in Las Vegas Sunday, Oct. 1, 2017. Chase Stevens—Las Vegas Review-Journal/AP
An injured person is tended to after a mass shooting at the Route 91 Harvest country music festival on Oct. 1, 2017 in Las Vegas. Ethan Miller—Getty Images A wounded woman is moved outside the Tropicana during an active shooter situation on the Las Vegas Strip in Las Vegas Sunday, Oct. 1, 2017. Chase Stevens—Las Vegas Review-Journal/AP A body is covered with a sheet at the intersection of Tropicana Avenue and Las Vegas Boulevard South after a mass shooting at a music festival on Oct. 1, 2017 in Las Vegas. STEVE MARCUS—REUTERS A cowboy hat lays in the street after shots were fired at the Route 91 Harvest country music festival after a shooting, Oct. 1, 2017 in Las Vegas. David Becker—Getty Images Drapes billow out of broken windows at the Mandalay Bay resort and casino, on the Las Vegas Strip following a deadly shooting at a music festival in Las Vegas on Oct 2, 2017. John Locher—AP/Shutterstock Investigators load a truck with bodies from the scene of a mass shooting at a music festival near the Mandalay Bay resort and casino on the Las Vegas Strip, in Las Vegas on Oct. 2 2017. Chris Carlson—AP/Shutterstock Flowers are placed near the scene of a mass shooting, that occurred at a music festival near the Mandalay Bay resort in Las Vegas on Sunday Oct. 2, 2017. Marcio Jose Sanchez—AP/Shutterstock More Must-Reads from TIME Donald Trump Is TIME's 2024 Person of the Year Why We Chose Trump as Person of the Year Is Intermittent Fasting Good or Bad for You? The 100 Must-Read Books of 2024 The 20 Best Christmas TV Episodes Column: If Optimism Feels Ridiculous Now, Try Hope The Future of Climate Action Is Trade Policy Merle Bombardieri Is Helping People Make the Baby Decision