The Marshall County Sheriff's Department and the CFSB Bank will hold a training exercise at the bank's Benton headquarters Thursday afternoon. Several area law enforcement agencies, including McCracken and Calloway counties, are expected to participate. The exercise will simulate a hostage situation and bomb threat with the goal of training responders and bank staff to deal with emergencies. The Marshall County Sheriff's Department says the exercise could cause traffic delays. Signs will be posted to indicate the training is in progress.