MONROE, Mich. (CBS DETROIT) – A 40-year-old man has died during surgery Wednesday after crashing his vehicle into a tree.

Police believe fatigue from his overnight shift caused the crash.

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It happened at North Custer Road across from Ruff Drive.

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Police say witnesses who saw the crash did not say speed or improper driving were factors in the crash.

Anyone with information is asked to contact Monroe Police at 734-243-7500.

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