She walked barefoot to the corner shop, just 300m from her front door.
She bought ice cream and a bag of sweets before she turned around, to head back home.
But on her way - she disappeared.
Marianne was 6 years old when she went missing and 43 years later, her case remains unsolved.
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If you have information that might be of importance to this case, please contact Norwegian Police.
Phone: +47 02800
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