Country singer Jason Aldean, who was performing at the Route 91 Festival in Las Vegas Sunday night when shooting broke out, posted an anguished note on social media about the fear, “anger, heartache, compassion” and other emotions he’s felt in the wake of the tragedy, which killed at least 51 people and wounded more than 500.

“Something has changed in this country and in this world lately that is scary to see. This world is becoming the kind of place that I am scared to raise my children in,” Aldean wrote. “We are all humans and we are all Americans and its time to start acting like it and stand together as ONE!”

He concludes by calling for Americans to “come together and stop the hate!”

Aldean is not the only musician who was present at the festival to speak up. Caleb Keeter, guitarist of the Josh Abbot Band, issued his own statement on Twitter in which the former Second Amendment proponent discusses how the shooting showed him “how wrong he was” and how although the band had legal firearms with them, they were scared to touch them or try to stop the shooter for fear of being mistaken for the shooter. Keeter also calls for gun control legislation, saying that “enough is enough.”

The Las Vegas shooting is the most deadly mass shooting in modern history, and the current casualty toll is 59 dead and over 500 injured either by the bullets or the resulting stampede.