At last five people have died in the US state of Indiana after a stage collapsed while crowds of people were waiting for a concert to begin.
Witnesses said a gust of high wind caused the steel structure to give way after a storm suddenly blew up.
Amateur video captured the moment that steel scaffolding fell into the terrified crowd, who were waiting for a performance by the country band Sugarland at the Indiana State Fair in Indianapolis.
Police initially said four people had died but later confirmed that there was a fifth fatality. One of the victims was named as stagehand Nate Byrd, 52, who was on the stage at the time of the accident.
At least 40 other people were taken to hospitals in the area.
The stage gave way on Saturday evening just moments after an announcement that warned of the coming storm and gave instructions on what to do in the event of an evacuation.
People were heard screaming and shouting as they ran to avoid the falling rigging.
But hundreds of concertgoers rushed forward tend to the injured, many trying to lift heavy beams, lights and other equipment that blew down onto the crowd.
Many of the injured were in the VIP section closest to the stage.
Emergency crews set up a triage centre in a tunnel below the grandstand at the Indianapolis fairgrounds.
Officials cancelled all activities at the fair on Sunday, but the event is expected to resume on Monday with a service honouring the victims.