A country music festival ended in tragedy last night after a gunman opened fire on a crowd of 20,000+ in Las Vegas, Nevada.

A shooter opened fire at the Route 91 Harvest Festival, a three-day country music event, in Las Vegas on Sunday night, reportedly killing at least 58 people and injuring well over 500 more, according to the Las Vegas Metropolitan Police Department (LVMPD).

The gunman, identified as 64-year-old Stephen Craig Paddock from the Nevada town of Mesquite, was found dead in a hotel room from an apparent suicide. Paddock opened fired on the nearby festival shortly after musician Jason Aldean took the stage from his hotel room at Mandalay Bay where he had at least 10 firearms at his disposal. He is believed to have acted as a ‘lone wolf,’ but police have said they are seeking a woman who may have been traveling with Paddock prior to the incident.

Videos of the incident began spreading across social media after the attack. In them, viewers can hear a series of rapid-fire gunshots go off just as Aldean takes the stage. The country star sang less than one full verse before abandoning the stage. You can view the moment in question below:

No motive for the shooting has been determined at this point.

The death toll may continue to rise in the hours and days ahead, but the incident has already become the deadliest mass shooting in US history. The last act of violence on this level, the Pulse nightclub shooting in Florida, happened less than 18 months prior.

Shortly before 11 AM on Monday morning president Donald Trump addressed the nation. In his brief speech, the 45th President of the United States condemned the violence in Las Vegas as “an act of pure evil”. His full statement is below:

Additional details are expected to surface in the near future. Please follow Substream on Twitter for updates as more information becomes available.