Singer Jason Aldean describes Las Vegas shooting rampage as "beyond horrific"

Washington: Popular American country singer Jason Aldean, who was performing when a gunman opened fire on concert-goers in Las Vegas, on Monday described the deadliest mass shooting in modern US history as "beyond horrific."

A video posted on social media captured the moment the gunshots began, forcing Aldean and his band to abruptly stop mid-song and leave the stage at the music festival in the Nevada gambling hub.

The video shows people screaming as the gunman fires multiple rounds on the crowd, with one woman yelling, "Oh my god," and others calling on others to "Get down."

"Tonight has been beyond horrific. I still don't know what to say but wanted to let everyone know that I and my crew are safe," Aldean wrote on his Instagram account.

"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," CNN quoted the 40-year-old singer as writing.

Aldean's band members were safe.

The two-time Academy of Country Music Entertainer of the Year Award winner has sold 15 million albums.

At least 50 people were killed in the incident. A total of 406 people were transported to area hospitals, the Las Vegas Metropolitan Police Department said in a statement.