Mounties in North Vancouver are asking the public's help in finding a missing 15-year-old girl who has been missing since Thursday night.

Police say Ying Ying (Mizuki) Sun left a note for her parents saying she was distressed about relationships.

They say she had recently befriended a man over the internet, but are not sure of his age or whether their relationship has anything to do with her disappearance.

Sun, a Handsworth Secondary High School student, has no known medical conditions but police say they are concerned for her wellbeing because of her age.

She has long, black hair and brown eyes. No description of her last known clothing is available.

Anyone with information on her whereabouts is asked to contact 911 immediately.