San Diego resident Roberto Alcaraz-Garnica was arrested Saturday night at a Beyoncé and Jay-Z concert for allegedly groping a young woman and biting off her boyfriend’s fingertip.

Reports and accounts of the incident state the 25-year-old Alcaraz-Garnica allegedly sexually assaulted the 20-year-old woman, whose boyfriend then confronted the man, reported the Pasadena Star News. The Star News also reported his arrest was made “on suspicion of sexual battery and mayhem, legally defined as disabling or disfiguring a part of a victim’s body, according to police and Los Angeles County booking records.”

In addition to Alcaraz-Garnica’s arrest, eight people were arrested for public drunkeness and two for ticket scalping. Approximately 55,000 people were in attendance in Pasadena’s Rose Bowl for the concert that was followed with another performance Sunday night.