UPDATE, 6:07 p.m. Thursday: Good news. The girl has been found and is safe.
A 15-year-old Topsfield girl last seen in neighboring Ipswich on Monday is possibly in need of medical attention, according to State Police.
An alert issued on Wednesday night by State Police and the Topsfield Police Department said they are looking for the public's help locating Marlena Voss.
Voss was last seen riding a bicycle in Ipswich on Monday, Jan. 6, according to police, and at the time was wearing a red coat, red Ugg-style boots and a two-tone backpack. Police did not say exactly where in Ipswich that Voss was seen riding a bicycle.
She is 5-feet, 9-inches tall with brown hair and blue eyes. Her photo is attached to this story.
If you have seen Voss or know where she is, you are asked to call Topsfield police at 978-887-6533.
Update: This story has been updated to reflect that police are concerned about Voss' well-being because she may need medical attention.