A fan of the metal band Bring Me The Horizon was pronounced dead at a show in London this past weekend.

The fan, identified as Ali Mills, was reportedly involved in an incident during the first portion of the show while in a moshpit last Friday. While the cause of death was not revealed, he was carried out by security and unsuccessfully resuscitated.

SHVPES vocalist Griffin Dickinson took to Twitter on Saturday, explaining what had happened. However, the tweets were since deleted.

“Last night at a BMTH show I saw a kid die,” he said, according to Blabbermouth. “He was carried out by 3 dudes & paramedics tried to resuscitate him to no avail. Please please please look out for people around you.

“Please please please look out for people around you. Don’t leave it up for someone else. If someone looks unwell, CHECK on them. In any situation, on a tube, at a gig, whatever. I feel like British ‘awkwardness’ gets in the way of helping people. Don’t be afraid to call an ambulance. Don’t act like it ain’t your business. ACT on it. Rest in peace to that dude. Thoughts are with his family rn.”

Bring Me The Horizon released a statement about the death, noting that they are “horrified.”

The venue, Alexandra Palace, said they did not have any further information about the “medical incident” that occurred.

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Multiple fans who were at the show that night called out the venue for under-trained staff, chaos, and blamed the lack of security.

Alexandra Palace responded the next day, clarifying that this was a “tragic medical incident,” but the venue’s security was up to par.

A concertgoer has started a petition entitled “Keep Concerts A Safe Place” asking that the security company SES be removed or undergo re-training, centre barriers be added, and extra security added in the pit section.

“Having witnessed first hand what happened in medical, and seeing the efforts of the 9 paramedics trying to save Ali’s life through automatic CPR, it was one that has scarred my mind and thoughts with nightmares to come,” the petition read.

The petition urged concertgoers to see the importance of safety at large venues, ending with “Music saves lives. Don’t let it end them.” So far, over 1,300 people have signed on.

There is no further information regarding the death of Mills at this time.