Just moments before rap superstar Travis Scott took the stage at the deadly 2021 Astroworld festival, a contract worker had been so worried about what might happen after seeing people getting crushed that he texted an event organizer saying, “Someone’s going to end up dead,” according to a police report released Friday.

The texts by security contract worker Reece Wheeler were some of many examples in the nearly 1,300-page report in which festival workers highlighted problems and warned of possible deadly consequences. The report includes transcripts of concertgoers’ 911 calls and summaries of police interviews, including one with Scott conducted just days after the event.

The crowd surge at the Nov. 5, 2021, outdoor festival in Houston killed 10 attendees who ranged in age from 9 to 27. The official cause of death was compression asphyxia, which an expert likened to being crushed by a car. About 50,000 people attended the festival.

“Pull tons over the rail unconscious. There’s panic in people eyes. This could get worse quickly,” Reece Wheeler texted Shawna Boardman, one of the private security directors, at 9 p.m. Wheeler then texted, “I know they’ll try to fight through it but I would want it on the record that I didn’t advise this to continue. Someone’s going to end up dead.”