POLAND, Maine (AP) — Police say a driver who struck and killed a pedestrian in Maine may have fallen asleep at the wheel after working all night.

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The Androscoggin Sheriff's Department says it's investigating Wednesday morning's fatal crash in Poland, Maine.

Police say the crash killed 47-year-old Richard Knox, of York County. They say a preliminary investigation shows Knox was struck by a vehicle operated by 52-year-old Grace Sleeper, who's from Oxford.

Police say Sleeper suffered injuries that were not life-threatening and was transported to a hospital in Lewiston. A hospital spokesman says Sleeper is no longer hospitalized there.

Police say alcohol does not appear to have played a role in the fatal crash.

There's no home telephone number listed for Sleeper, who can't be reached for comment.