SPANAWAY, Wash. -- Students at Spanaway Lake high school in Washington have been engaging in extreme fighting at random spots that often leaves the participants bruised, battered, and bloodied, local station KIRO reported.

Students reportedly call it a "fight club," after the movie of the same name.

Teens engage in hand-to-hand combat surrounded by crowds of cheering kids.

According to students, the club meets every Friday. The location is determined at the last minute to keep it a secret.

Everyone, no matter size or sex, can fight.

One senior, who declined to be identified, said he's fought in the club. He downplayed the risks, but admitted that parents would be upset if they knew about the club.

Pierce County sheriff's spokesman Ed Troyer said they will work with the school to break up the clubs and said police were concerned that smaller, younger kids may be forced into fighting.

Investigators said it was possible that charges could be filed against some fight club members, especially since some of the fights took place in public parks.

The principal at Spanaway Lake said that to her knowledge, the fights weren't happening on campus and that the school's resource officer will get involved.