Châteauguay police is asking the public to look out for Mia Bertrand, 13, who was last seen on Sept. 18. The force says she was last seen in Châteauguay, on the South Shore, in a bus travelling to Angrignon, a neighbourhood on the Island of Montreal. Police stress that her family and friends have reason to fear for her health and safety. Bertrand speaks French and was last seen wearing a black dress with a zigzag hem and a dark jacket. Her hair was tied in a ponytail. She is described as 1.58 m (5′5″) in height and weighing 50 kg (110 lbs). She has brown hair and eyes.