Police seek missing 13-year-old girl from Salaberry-de-Valleyfield, Que.

Quebec provincial police are asking for the public's help in finding a missing 13-year-old west of of Montreal.

Amy St-Denis was last seen Monday on St-Thomas Road in Salaberry-de-Valleyfield, Que., before fleeing on foot, police say.

Investigators say her loved ones have reason to fear for her health and safety.

The teen is described as having brown and black hair, brown eyes and tattoos on her left forearm.

She was last seen wearing a pair of white pyjama pants with red hearts, a black hooded jacket with Marty & Rickywritten on it and black sandals with white stockings.

Anyone with information about her disappearance is asked to call 911.