WILLMAR -- Authorities are asking for your help in finding a missing teenager.

The Willmar Police Department and the Minnesota Bureau of Criminal Apprehension is looking for 17-year-old Madison Hjermstad of Willmar.

Authorities say she left a juvenile facility in Willmar on foot with another teen back in July. The other teen was found, however Hjermstad wasn't and has not made contact with her family since.

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She is described as a white female with long dark hair, about 5'8" tall and weighting 135 pounds.

Anyone with information on her whereabouts is asked to call the Willmar Police department at 320-235-2244.

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