A family member came to their assistance and was also assaulted, a police spokesperson said.
Police said they believed the intervention of the family member stopped any further assault on the person.
The offender then left the scene, police said.
Both victims required treatment at hospital and are assisting police with enquiries.
Police would like to speak to anyone in the Opawa area who had property disturbed on Saturday evening or Sunday morning or has information that could assist the investigation.