The sexual assault of a Drumheller man in his home has RCMP looking to the public for help finding the suspect.

Around 10 p.m. on Sunday, a man knocked on the victim's door, asking to use the phone.

Once the door was open, the suspect forced his way in and sexually assaulted the man.

In the days leading up to the attack, the same suspect knocked on other doors but no other assaults were reported, according to RCMP.

The suspect is described as five feet 10 inches and was wearing a green sweater, light blue baseball hat and a black balaclava.

Anyone with information is asked to contact RCMP or Crime Stoppers.