The Topsfield Police Department and State Police are asking for the public’s assistance to help locate a 15-year-old girl from Topsfield who has been missing since Monday.

Marlena Voss, who is described as being 5-feet-9 with brown hair and blue eyes, was last seen in Ipswich riding a bicycle, said State Police in a statement. She was wearing a red parka, red Ugg-style boots, and a two-tone backpack.

Authorities said Voss might be in need of medical help.

Anyone who may have information on Voss or her whereabouts is urged to call Topsfield police at 978-887-6533.