08/11/2013 03:29 EDT | Updated 10/11/2013 05:12 EDT

B.C. transit police ask mother of girl who was sexual assaulted to come forward

VANCOUVER - Transit police in the Vancouver area are asking a mother who reported that her daughter had been sexually assaulted on the region's SkyTrain system two weeks ago to come forward.

A news release says in the earning evening of July 27, the first day of Vancouver's Celebration of Light fireworks festival, transit police were called to a report of a man in his underwear threatening people on at a downtown SkyTrain station.

Police learned that, earlier, a woman at a previous station had told transit staff that a man on the train had touched her daughter inappropriately, but declined to provide her name.

The suspect was a 27-year-old man from Surrey who police say has a serious mental-health condition and was taken to hospital for evaluation.

The news release says the man had almost 80 interactions with the mental-health system in the weeks prior to the incident, and he had walked away from the home where he lives with a caregiver.

The police say they want the mother to contact them as they investigate the incident.