NORMAN, Okla. (AP) Cleveland County Sheriff's Department officials say a trainee was saved from serious injury when a bulletproof vest stopped a bullet.

Undersheriff Rhett Burnett says trainees and deputies were taking part in a training exercise Saturday in Slaughterville when a deputy's gun accidentally went off. The bullet hit a trainee's vest and was stopped.

The trainee was treated and released at Norman Regional Hospital. No names have been released.

Burnett says investigators are looking into the incident but says it doesn't appear any department policies were violated.