The news of the horrific shooting at the Route 91 concert in Las Vegas by a gunman firing from a hotel room on the 32nd floor of the Mandalay Bay has shocked citizens across the U.S. and the world.

Thus far the gunman, Steven Craig Paddock from Mesquite, Texas killed 50 including an off-duty LVMPD officer, and left more than 400 concert goers injured. Paddock killed himself prior to Las Vegas PD locating him at his Mandalay Bay hotel room.

The Route 91 Harvest Festival, a three day event, was headlined by well known country artists including Eric Church, Sam Hunt, Big & Rich, Brothers Osborne, Jake Owen, Jason Aldean, and others.

LiveNation hosts this event, which was started in 2014.

The festival had multiple stages at Las Vegas Village, an open-air setting that is diagonally across the street from the Mandalay Bay hotel complex. The shooter reportedly fired from a high floor in the hotel.

Jake Owen had finished his set prior to Jason Aldean’s when the attack started.

He sent out the following tweets: