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A volunteer firefighter has been charged with arson for allegedly setting several structure fires in Story County.

The Story County Sheriff’s Office says 19-year-old Brett Graham of Kelley is charged with three counts of second degree arson. They say he was observed leaving the scene of a fire near Kelley Thursday and when investigators interviewed him he admitted to starting the fire. He also admitted to starting multiple other fires in the Boone and Story county area.

Graham is a volunteer firefighter with the Kelley Fire Department.

He is being held in the Story County Jail on a bond of $30,000.