An elderly couple in a semi-detatched house in Wolfhill Avenue, north Belfast, had to leave their home after an empty property next door to them was set ablaze.
The emergency services were told of the blaze – which is being treated as arson – shortly before 8.55am on Saturday.
The residents in the other property were not injured, however minor smoke and water damage has been caused to their property.
Detective Sergeant Michelle Griffin would appeal to anyone who may have noticed any suspicious activity around this area to contact Detectives at Reactive and Organised Crime at Musgrave PSNI Station on the non-emergency number 101. Or, if someone would prefer to provide information without giving their details they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111.