Country singer Jason Aldean, who was performing when a gunman opened fire on concertgoers in Las Vegas on Sunday, released an emotional statement about now being afraid to raise his kids in a world occasionally marred by violence.

"This world is becoming the kind of place I am afraid to raise my children in," Aldean said in a statement posted Tuesday on Twitter.

A video released Monday showed the moment 64-year-old Stephen Paddock opened fire as Aldean performed. The band stopped playing as shots rang out, then a second round of shooting began.

Paddock was later found dead in his hotel room by police. Police said Paddock had 42 guns in his possession: 23 guns in his hotel room and 19 guns at home in Mesquite, Nev.

"Something has changed in this country and in this world lately that is scary to see," Aldean said.

He called on Americans to unite after the attack that left more than 50 dead and at least 500 injured, no matter their political views, gender or race.

"At the end of the day we aren't Democrats or Republicans, Whites or Blacks, Men or Women. We are all humans and we are all Americans and its time to start acting like it and stand together as ONE! That is the only way we will ever get this Country to be better than it has ever been, but we have a long way to go and we have to start now," Aldean wrote.