STERLING, Kan. (AP) An event to teach emergency responders to fight ethanol fires is attracting more interest than organizers had anticipated.

About 300 people are expected to attend the training exercise Friday at the Kansas Ethanol LLC Plant north of Sterling.

Plans are to ignite at least four fires in large open burn tanks during the three-hour exercise. The exercise will determine which types of foam best extinguish ethanol fires.

Jennifer Dellar, the plant's safety and purchase officer, says the exercise was originally planned for Sterling-area firefighters. But volunteer firefighters and emergency responders from 29 departments across the state will attend.

She says foam vendors, insurance company representatives and representatives from a half dozen other ethanol plants around the country will also attend. The public is not invited.