As of this writing, more than 50 people were killed following Sunday night’s mass shooting during an outdoor country music festival in Las Vegas. A gunman on a high floor of a Las Vegas hotel opened fire on festival-goers, killing more than 50 people and injuring hundreds of others in what is being called the deadliest mass shootings in American history.

Jason Aldean, the night’s headliner of the three-day festival, was performing when the incident took place. After the scare, the country music star confirmed he was safe in an Instagram post and described the scene as “horrific.”

“Tonight has been beyond horrific. I still don’t know what to say but wanted to let everyone know that me and my crew are safe,” he wrote. “My Thoughts and prayers go out to everyone involved tonight,” he wrote. “It hurts my heart that this would happen to anyone who was just coming out to enjoy what should have been a fun night.”

In the aftermath, as more details become available, several celebrities and influential figures poured their reactions online.

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