HONOLULU -- An investigation into why Honolulu International Airport security officers failed to screen some checked bags for explosives says the slip-up might not have happened if Transportation Security Administration supervisors did a better job of overseeing the officers.

The probe from the Department of Homeland Security's inspector general's office, released Tuesday, said the incident at the airport's Lobby 4 two years ago may have been avoided if adequate staff and screening equipment had been provided.