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PIERRE, S.D. (AP) — The South Dakota Highway Patrol says an all-terrain vehicle operator has died after hitting a tree in Pierre.

The patrol says the 65-year-old man was driving the ATV on a city street Saturday afternoon when he crashed. He was not wearing a helmet. The unidentified driver was taken to a Pierre hospital then flown to a Sioux Falls hospital where he died Sunday.

The Highway Patrol is investigating.