MINNEAPOLIS (WCCO) — The State Fire Marshal says the cause of a fatal Vadnais Heights house fire on New Year’s Day in 2015 is undetermined.

Joanne Nielson, 54, died in the fire at the home on the 700 block of Berwood Avenue.

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Joanne Nielson (credit: CBS)

Joanne Nielson (credit: CBS)

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Firefighters found her buried under ceiling debris. The medical examiner said her official cause of death was smoke inhalation.

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The fire marshal says although the blaze was likely connected to the home’s fireplace, the cause is inconclusive.