A security issue prevented Mexican fans from seeing the conclusion of last night's Knotfest in Mexico City (November 30th.) The stage barricade broke during Behemoth's set and it was impossible to fix in time for the final two acts of the night, Slipknot and Evanescence.

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Slipknot offered this statement to understandably upset fans:

“Due to unforeseen circumstances, Slipknot were not able to perform at last night’s Knotfest. Security barricades became an issue, and it was decided that for the safety of the fans, neither Slipknot or special guests Evanescence could take the stage.

We had hoped to be able to perform today, but regrettably, a situation arose onstage after the cancellation that damaged or destroyed gear that would have been necessary to play. We are extremely disappointed that we did not get the chance to perform, but the safety of our fans and our community is our biggest priority. We will look to get back to Mexico sometime in the future.”

Evanescence frontwoman Amy Lee issued this statement in a video message:

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"Mexico City, we are so, so disappointed that we didn't get our chance to play for you tonight at Knotfest. The last couple of bands didn't get to play because of a safety issue with the barricades and it wasn't something that could be fixed. We are so sorry. We love you so much. We were waiting there, just like you, hoping that we would get our chance, but it didn't work out tonight. I don't know how, but somehow we are going to make it up to you. We love you so much. We'll see you next time."

The event was scheduled for the Parque Deportivo Oceanía venue, with last night, being Knotfest and today being "Forcefest" headlined by Rob Zombie.

According to Rock Feed, fans jumped a fence separating two separate sections leading to some chaos. Later in this video, there is footage of some attendees getting onto the stage and destroying equipment from Evanescence. You can see the footage below:

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Where the heck is security? No injuries have been reported as of this writing.