Authorities say 10 people were injured Monday night at a promotional event outside the Hollywood & Highland shopping center. The AP reports that an apparent stampede took place at the event, where the rapper Phora was holding a meet and greet in a shoe store.

“KABC-TV says when Phora stepped outside, he was engulfed by fans, some of whom had been standing for hours. Police called it a stampede. Fans said there was only pushing and shoving but some people hyperventilated and passed out,” the AP reports.

The report cites the Los Angeles Fire Department saying 10 teens and young adults were treated for illness or injury from “a crowd surge.” Eight people were reportedly taken to hospitals.

The report notes that the injuries were not life-threatening.

“Phora apologized to the fans and said he hoped nobody was seriously hurt,” the AP reports. “Police cleared the crowd. No arrests were made.”