Fingertip bitten off at Beyonce-Jay Z concert

Beyonce, left, and Jay-Z perform "Drunk in Love" at the 56th annual Grammy Awards at Staples Center on Sunday, Jan. 26, 2014, in Los Angeles. (Photo by Matt Sayles/Invision/AP) (AP2014)

June 28, 2014. Jay Z and Beyoncé perform on the On The Run Tour at the Great American Ball Park in Cincinnati, Ohio. (The Associated Press)

Authorities say a man was arrested at Jay-Z and Beyonce's Rose Bowl concert in Southern California after allegedly groping a woman and then biting off the tip of her boyfriend's finger during a fight.

The San Gabriel Valley Tribune reports 25-year-old Roberto Alcaraz-Garnica of San Diego was taken into custody Saturday on suspicion of sexual battery and mayhem.

Pasadena police Lt. John Luna says Alcaraz-Garnica was accused of groping a woman in her 20s. When the woman's boyfriend confronted him, a fight broke out. Luna says during the altercation the suspect bit off the tip of one of the boyfriend's fingers.

Alcaraz-Garnica was being held in lieu of $100,000 bail. It isn't known if he has a lawyer.

Police say 10 other people were arrested during Saturday's concert, which drew about 55,000 fans.

A second concert was held Sunday.