(AP) — A former volunteer firefighter in Reno County pleaded guilty to setting three grass fires after prosecutors agreed to drop 11 other charges.

Nineteen-year-old Cody Knox, of Arlington, was a volunteer for Reno County Fire District No. 4, which covers Arlington, Langdon, Plevna and Abbyville.

Reno County District Attorney Keith Schroeder previously said Knox used a cigarette lighter to set the fires, all of which occurred near Arlington last October and November.

At the time of the fires, Knox was studying fire science at Hutchinson Community College.