SQ asking for help to find missing teen from Salaberry-de-Valleyfield

The Sûreté du Québec is asking for the public’s help in locating 16-year-old Alexia Gauthier of Salaberry-de-Valleyfield.
She was last seen at around 3:30 p.m. on May 5, when she left home on foot. Her family is concerned for her health and safety.
Gauthier is 5-feet-11 (1.8 metres), weighs about 145 pounds (66 kg), has brown hair and brown eyes, and was last seen was wearing black clothing and carrying a knapsack.
Anyone with information that could help locate this pe