Sugarland Stage Collapses at Indiana State Fair !!!!

(CNN) -- A stage at the Indiana State Fair collapsed Saturday night, killing at least three and injuring 24, officials said.

It was not immediately clear what caused the collapse, though Aaron Richmann, who witnessed the incident, told CNN the wind picked had up and that he saw some people trapped underneath the stage.

"A big gust of wind came through. You could see a lot of people panicking. All the scaffolding and speakers -- all that came crashing down -- and the whole stand just collapsed," he said.

Richmann described the scene as "really chaotic."

The Indianapolis Department of Public Safety posted on its Twitter page the death toll and said that 24 people had been taken to area hospitals.

The country music duo Sugarland was scheduled to perform on the stage Saturday night.

"We are stunned and heartbroken for the fans and their families in Indiana." said Sugarland singer Jennifer Nettles. "We hold those injured in our prayers at this very sad time. There are no words. It is tragic.

Sara Bareilles, the opening act for Sugarland, also posted a message.

"Fortunately we are all safe, but a tragic stage accident has injured some folks in Indiana. Our prayers are with them and their families," she said in a Twitter post.