The Duluth Police Department on Wednesday again asked for the public's help in locating a 48-year-old woman missing for more than three weeks.

Sheila St. Clair has been missing since Sept. 1. Authorities said they believe St. Clair was planning to travel to the White Earth Reservation in western Minnesota, but she never arrived.

Duluth police said Wednesday that the disappearance is considered suspicious in nature.

In a previous request for the public's help, authorities said St. Clair has health issues and it was unusual for her to be out of contact for so long.

St. Clair does not have a car and may have received a ride from someone, officials said. She is described as a Native American female, 5 feet, 5 inches tall, 125 pounds with black hair and brown eyes.

Anyone with information about St. Clair's whereabouts is asked to call 911 or (218) 730-5050.