Three fans were hospitalized after a stampede occurred before Travis Scott’s Astroworld Festival in Houston opened its gates.

The rapper posted a video on Instagram of fans pushing down barricades and running toward the NRG Park parking lot prior to when gates were scheduled to open for the sold-out crowd of 50,000 festivalgoers.

The Houston Fire Department confirmed that three people were transferred to nearby Memorial Hermann hospital with leg injuries they sustained after being trampled.

“Da youth dem control the frequency,” Scott wrote of the incident. “Everyone have fun. Ragers set tone when I come out tonight. Be safe rage hard.

The 2019 Astroworld Festival will feature performances by Scott, Migos, Pharrell Williams, Marilyn Manson, Rosalia, Megan Thee Stallion, Da Baby and more.