Firefighters have not official determined what sparked the blaze , but are considering it to be accidental , Spencer said . NEW : Several logs at a saw ##mill were also engulfed by the fire . The fire is on the Crow Indian Reservation . Two firefighters are killed while fighting the blaze .
NEW : Several logs at a saw ##mill were also engulfed by the fire . The fire is on the Crow Indian Reservation . Two firefighters are killed while fighting the blaze .