Transit Police are trying to identify a man who is alleged to have sexually assaulted three women on the SkyTrain over the Labour Day long weekend.

Around 11:30 a.m. PT Saturday, the alleged suspect boarded a SkyTrain headed for downtown Vancouver at Edmonds Station in Burnaby.

He moved behind a woman and began rubbing and touching her in a sexual manner before she moved away.

The suspect is alleged to have then touched at least two other women in a similar manner.

A witness took photographs of the alleged suspect, who is described as possibly a Hispanic male, 25 to 40 years old, five feet five to five feet eight inches tall, with short black hair.

He was wearing a white T-shirt with a grey emblem and an unknown word on the front, black shorts, sunglasses and Walkman-style earphones.

"In the photographs, he appears to be just standing on the train kind of looking off into the distance, kind of indifferent, kind of disinterested," said TransLink spokeswoman Anne Drennan.

"While he is assuming that posture, his hand is reaching out doing inappropriate things to women."

Transit Police say only the first victim identified herself to police and are asking the second and third victims to come forward by calling 604-515-8300.

Anyone with information regarding the identity of this person is asked to call Transit Police. They can call Crime Stoppers if they wish to stay anonymous.