CLEVELAND, Ohio -- Cavaliers coach Tyronn Lue said three of his friends were among the more than 500 injured at a Las Vegas concert Sunday night in which 59 people were killed.

Lue, 40, has lived in Las Vegas for the past nine summers. A gunman opened fire at the conclusion of country singer Jason Aldean's concert in what became the largest shooting massacre in U.S. history. In addition to the hundreds wounded by the gunfire, there were also fans who were injured in the frantic effort to leave the concert area.

"I knew a lot of people that were affected, a lot of people that were there," Lue said Wednesday, before the Cavs' preseason opener against the Hawks. "Just not about my people, but just a horrible thing to have to go through, especially when I lived there for nine years and knowing all the people I know out there that work at the Mandalay Bay and Aria, all different casinos. Having to go through that, being at that concert. It was a tough thing to go through.

"I feel sorry for all the loved ones of each one that lost someone or been badly hurt," Lue continued. "It's just not a good thing. I knew you guys would probably bring it up. I've been touched by a few people who'd gotten injured, who'd gotten shot. Just a tough position to be in.

"When you're going through your phone and so many people who lived out there, were great friends of yours and took care of you, you've been around for so long. It's just tough to go through that experience."

Lue said 15 of his friends attended the concert, and all three of his friends who were shot are still alive.

Lue owned a home in Las Vegas but sold it two years ago and has stayed the past two summers at the Aria hotel and casino.

The shooter opened fire from a room at Mandalay Bay, which is at the opposite end of the Vegas strip.