TORONTO -- Fans are fuming after goth rocker Marilyn Manson abruptly cancelled a Toronto concert due to "unforeseen illness."

A video posted to Twitter shows the crowd booing as a show official broke the news Thursday evening, shortly before Manson was slated to take the stage.

Concert-goers at Budweiser Stage were offered refunds or given the option to watch Rob Zombie play an extended set.

Manson and Zombie are scheduled to bring their "Twins of Evil" tour to the Heavy Montreal festival on Saturday.

Tour representatives could not immediately be reached for comment.