Stage collapse in Toronto kills one ahead of Radiohead show

"Shortly after 4 pm, a partial piece of stage at Downsview Park collapsed," a Toronto police spokesman said. "There is one person deceased."

Three other people were injured, including a man in his 40s who was hospitalized.

The accident struck at Downsview Park about three and a half hours before the show was to start.

The concert was canceled and officials opened a probe into the cause of the accident. Contrary to early speculation, there were no strong gusts of wind at the time the stage collapsed.

Police said they would not release the identity of the deceased until his family was informed.

The victims were all part of a team installing projectors and speakers on the stage and on the metal scaffolding above the stage.

Police said that the accident took place one hour before ticketholders were allowed to enter the grounds -- but could have been much worse had a crowd been there and panicked.

Radiohead posted a message on Twitter saying that: "Due to unforeseen circumstances tonight's (show) at Downsview Park has been cancelled. Fans are advised not to make their way to the venue."

According to Radiohead's official website, the Toronto concert was sold out. Downsview Park can accommodate up to 40,000 spectators.