Winnipeg police are asking for the public's help locating a 20-year-old woman who has been missing for more than three weeks.

Amber Guiboche was last heard from on Nov. 10 at 11:45 p.m. She was last seen in the area of William Avenue and Isabel Street and investigators believe that she may have entered a vehicle in this area.

It is unusual for Guiboche to not contact family and friends, said police.

Officers said police and family members are "very concerned" about the well-being of Guiboche.

She is described as a white, about five feet five inches (165 cm) in height, with a fair complexion, weighing approximately 108 pounds (49 kg), with long, straight, light-brown hair often worn in a pony tail and brown eyes. She was last seen wearing a white Adidas hoodie with gold stripes on the sleeves, skinny jeans and new white and pink skater-style runners.

Anyone with information on her location is asked to contact the missing persons unit at 986-4510, Child Find at 1-800-532--9135 or the non-emergency police line at 986-6222.