HILL CITY, S.D. (AP) — A wildfire in the Hill City area in western South Dakota is about 50 percent contained, but it's still producing a lot of smoke.

The Great Plains Fire Information office says the Storm Hill Fire is burning mainly bug-killed trees and fallen timber, and smoke will be visible for days.

The fire that started Saturday burned about 200 acres of private and U.S. Forest Service land. That's about one-third of a square mile. Officials say it was started by a person, but the exact cause isn't yet known.

The fire at one point threatened some structures and forced the closure of a highway. No injuries have been reported.

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