Jason Aldean was performing at the time of a mass shooting in Las Vegas, Nevada.
He took to instagram Monday morning to share his thoughts.
Tonight has been beyond horrific. I still dont know what to say but wanted to let everyone know that Me and my Crew are safe. My Thoughts and prayers go out to everyone involved tonight. It hurts my heart that this would happen to anyone who was just coming out to enjoy what should have been a fun night. #heartbroken #stopthehate
"Tonight has been beyond horrific," Aldean wrote in the post. "I still don't know what to say but wanted to let everyone know that Me and my Crew are safe.
More than 50 people are dead and upwards of 400 injured after a lone gunman opened fire on an outdoor country music concert on the Las Vegas strip Sunday night.
It is the deadliest shooting in modern U.S. history.