Calgary police are looking for help identifying a suspect who they believe groped a developmentally delayed man on a C-Train.

The 31-year-old victim was followed onto the C-Train as he boarded at the City Hall station at about 3:10 p.m. on Sunday, police say.

The suspect sat next to the victim and then began to grope him and make sexually explicit comments once the train was in motion, according to police.

The suspect then got off the train at the Max Bell station, while the victim continued on to another stop.

Based on CCTV footage of the suspect's behaviour, investigators believe the victim was targeted because of his special needs.

The suspect is described as about 35 to 45 years old, standing about 5 feet, 10 inches tall, with brown skin and dark hair.

He was seen wearing a dark-coloured tuque, along with a dark-coloured hoodie, blue jeans, black hiking shoes and a dark grey or dark blue winter jacket with white trim down the sleeves and across the chest and back.

Anyone with information about the incident or the person in the photo is asked to contact police at 403-266-1234 or Crime Stoppers anonymously.