The daily's Web site (www.idnes.cz) quoted concert promoter Petr Novak as saying the truck, which crashed while traveling through Romania, was carrying special sections of the stage.
"Unfortunately a large part of the special podium remained trapped in the truck and it was not possible to replace it," Novak was quoted as saying.
He added that he had no further details of the accident or when the concert would be rescheduled.
Michael has been in Prague since Thursday evening and was not involved in the accident.
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