Metro Vancouver Transit Police are appealing to the public to help identify a man suspected of committing an indecent act on board the SkyTrain. 

On Feb. 8 around 12:30 p.m. PT, a 15-year-old and several of her friends were travelling from Surrey to downtown Vancouver via SkyTrain. 

Transit Police say a man got on the train at Main Street Station and stood in front of the teens before he unzipped his pants, exposed himself and committed an indecent act. 

Both the teens and the suspect got off the train at Granville Station. 

The suspect is described as a dark-skinned male between 30 and 40 years old. He's believed to be about six foot two inches tall (188 cm) with broad shoulders, a heavy build and dark buzz cut hair with a short beard.

He was wearing a dark blue sweater, dark jeans and black shoes at the time of the incident. 

Anyone with information is asked to contact Transit Police.