Photo: Will Crews

Caleb Keeter, one of the performers at the Route 91 Harvest country music festival in Las Vegas, has changed his stance on gun control following Sunday night's horrific attack, saying, "We need gun control RIGHT NOW."

"My biggest regret is that I stubbornly didn’t realize it until my brothers on the road and myself were threatened by it," Keeter, who is the guitarist for the Josh Abbott Band, wrote Monday on Twitter, adding: "I’ve been a proponent of the 2nd amendment my entire life—until the events of last night. I cannot express how wrong I was. We actually have members of our crew with CHL [concealed handgun] licenses, and legal firearms on the bus."

Keeter said those weapons, in his opinion, were "useless" because they were concerned police "might think that we were part of the massacre and shoot us. … Enough is enough. Writing my parents and the love of my life a goodbye last night and a living will because I felt like I was’t going to live through the night was enough for me to realize that this is completely and totally out of hand."

As of this writing, authorities have confirmed at least 58 deaths and 515 injuries when a gunman opened fire from the 32nd floor of the nearby Mandalay Bay Hotel during Sunday night's festival in Las Vegas.