Ottawa police are asking for help from the public after a sexual assault in a central Ottawa park Tuesday night.

Police said a mentally disabled male in his late teens, who was working at a nearby grocery store, was lured into Rivierain Park in Vanier sometime between 6:30 p.m. and 10:30 p.m.

They said he was struck while walking along North River Road and became unconscious.

When he woke up, police said he was naked and had been sexually assaulted. He found his clothes, left the area and was helped by a couple. The couple were interviewed by police on Wednesday morning.

Ottawa police said they were informed of the incident the next day.

The victim was wearing an orange and yellow reflective vest as he walked to the park, police said, but they don’t have a description of the suspect.

Anyone with any information on this or other similar incidents is asked to call the Ottawa police’s sexual assault and child abuse unit at 613-236-1222, ext. 5944, or Crime Stoppers at 613-233-8477.