INDIANAPOLIS - An outdoor concert stage collapsed in windy weather at the Indiana State Fair on Saturday, just minutes before the music group Sugarland was set to perform, eyewitnesses said.

There was no immediate word on any injuries.

Concertgoers were helping hold up parts of the collapsed stage that fell into the standing area below to help anyone who might be trapped, eyewitnesses said.

David Lindquist, music critic for the Indianapolis Star, tweeted: "Tragedy at fair concert. Entire stage collapses on track."

He also tweeted: "Perhaps a dozen injured people have been removed from track on stretcher-type boards."

Eyewitnesses said the weather was windy and it had started to rain.

Authorities said a news conference was scheduled shortly to provide more details.