Alcohol is believed to be a factor in a Friday night single vehicle accident that killed a Mandan man.

The crash took place Friday night, about 8 p.m., on Highway 11, West of Ellendale. Authorities say the man failed to negotiate a curve and flipped his truck in the ditch.

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Highway patrol say the driver was not wearing his seat belt and was pronounced dead at the scene. The man was 74 years old.