One Dead After Radiohead Stage Collapse in Toronto

Coachella 2012 - Radiohead Thom Yorke

A crew member is dead and at least three more injured after a massive accident just hours before the band was to take the stage.

A stage technician was killed and at least three people were seriously injured after a stage collapsed at Toronto's Downsview Park just hours before Radiohead was to take the stage, according to a CBC report.

Emergency crews were first called in around 4 p.m. ET, with as many as five ambulances, two police cars and a firetruck arriving at the scene.

The gates had been scheduled to open at 5 p.m. for the 7:30 p.m. showtime, and thousands were already lined up when representatives from Live Nation, the concert's producers, announced the show had been canceled.

Downsview Park announced via Twitter, "CONCERT IS CANCELLED. Details to come from Livenation shortly. ?#Radiohead? ?#Toronto?," updating later, "Radiohead concert cancelled. There has been an incident, more details forthcoming."

Shocked concertgoers have been filing back to their cars since word spread of the accident.

The incident brings back dark memories of a horrific stage collapse last August at the Indiana State Fair, which had killed seven people in a crowd that had gathered to watch country duo Sugarland perform. The accident was captured on video and watched by millions on YouTube.