A criminal investigation is underway after crowd at a Houston music festival on Friday suddenly surged toward the stage during a performance by rapper Travis Scott, killing at least eight people, officials confirmed. Houston Mayor Sylvester Turner told CNN's Pamela Brown on Sunday that his team met to begin reviewing what happened at the concert. The investigation "will take weeks, if not longer," he said. Around 50,000 people were in attendance at Scott's music festival, which started in 2019. As a timer clicked down to start the rapper's performance, concertgoers pushed toward the stage at NRG Park in Houston, crowding the stage and leaving little room to move. The crowd surge left at least eight people dead and scores injured. Witnesses described a complete security collapse at the venue. 🔗 Visit our link in bio for the latest on this story. 📸: Robert Bumsted, @apnews