Update: Lewis and Clark County Sheriff's Office confirmed that Hannah Mattausch was safely located Saturday evening.
Officials are asking the public to keep an eye out for a missing teen last seen at 7:30 a.m. Thursday at Helena High School.
Hannah Mattausch, 15, is 5 feet 4 inches tall and weighs 150 pounds with brown hair and blue eyes. She was last seen wearing a black hoodie, gray leggings and black and orange sneakers.
Anyone with information on Hannah's whereabouts is asked to contact the Lewis and Clark County Sheriff's Office at 447-8293.