MINNEAPOLIS (WCCO) – A 54-year-old Burnsville woman died and two others were hospitalized late Saturday night after a boat crashed into a dock and boat lift in northern Minnesota.

The St. Louis County Sheriff’s Office says the crash happened around 11:15 p.m. on Dinham Lake in Ellsberg Township, which is about 60 miles north of Duluth.

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While the cause of the crash is under investigation, authorities believe speed, night-time operation and alcohol were all factors.

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The boat was carrying four adults, one of which was thrown into the lake upon impact. Witnesses rescued the victim from the water, and the victim was were transported to Essentia St. Mary’s Hospital in Duluth with life-threatening injuries. That victim was pronounced dead at the hospital and was identified as Ann Marie Delanghe.

Two other victims with lesser injuries were brought to a hospital in Virginia, Minn., for treatment. One of the four on board refused medial support. The four total were two couples from Burnsville and Duluth.

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The driver of the boat, a 50-year-old Duluth man, is actively being investigated for criminal vehicular homicide.