Video taken at the event shows the stage collapsing
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Video shows US Indiana stage collapse

At least four people have died after a grandstand collapsed at a concert in the US state of Indiana, officials have said.

The authorities said the stage came down during a storm at the Indiana State Fair in Indianapolis, as the band Sugarland were about to perform.

About two dozen people were injured and a number of people were reported to have been trapped beneath the wreckage.