Nevada Department of Corrections spokeswoman Suzanne Pardee says the agency's inspector general's office is interviewing staff to find out what happened during the June 26 barbecue and fund-raiser hosted by the Vietnam Veterans of America. It was unclear what the event was raising money for, and a message left Sunday at the Vietnam Veterans of America state headquarters wasn't immediately returned.

A copy of the minutes from a Tuesday prison staff meeting referred to the barbecue as a "fiasco." The minutes say the band members wore appropriate attire to enter the prison but later changed.

The Nevada State Prison is a medium security prison and houses about 700 inmates.