TOPSFIELD, Mass. (WHDH) — Police are asking the public for their help in finding a missing 15-year-old girl.

Marlena Voss of Topsfield was last seen riding a bicycle in Ipswich on Monday. She was wearing a red coat, red Ugg-style boots and a two-tone backpack.

Police describe her as being 5 feet 9 inches tall with brown hair and blue eyes.

The missing teenager may be in need of medical help.

If you have seen Marlena, or have any information on her whereabouts, please call the Topsfield Police Department at (978) 887-6533.

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