INDIO (CBS) —  A 17-year-old woman was sexually assaulted inside a portable bathroom at the Stagecoach Country Musical Festival in Indio, a police spokesman said Saturday.

The country music festival was marked with significantly more arrests — a total of 57 — than the two rock music festivals that preceded it, police said. Ninety-five percent of Friday’s arrests were for drunken conduct.

READ MORE: 3 Children Stabbed To Death In Reseda Apartment; Mother Captured In Central California After Going On The Run

The teenager told police at 8:30 p.m. Friday that she had been using a portable bathroom when a man opened the door, and along with two other men, sexually assaulted her, Indio police spokesman Ben Guitron said.

The three men left the area after the assault and the victim sought help from staff at a first aid booth before she was taken to a hospital for treatment, Guitron said.

READ MORE: LAPD Searching For 3 Men Suspected Of Posing As Construction Workers, Burglarizing Homes

“The victim described the suspects as males, and that one of the suspects had blond hair,” Guitron said. “We have no further suspect information at this time.”

The victim is not a resident of the Coachella Valley and was attending the concert with friends, he said.

(©2012 CBS Local Media, a division of CBS Radio Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. Wire services contributed to this report.)

MORE NEWS: Hideki Matsuyama Makes History As First Japanese Man To Win Golf Major