Two canisters left outside a bungalow and set on fire caused damaged to the property in Northampton.
Police are now investigating the arson in Avon Drive, Kings Heath, which officers believe took place at around 10.30pm on Sunday April 13.
It appears that two fuel canisters were placed outside the back door of a mid-terrace bungalow, set on fire and left to burn.
This caused damage to the rear door and window of the property.
Witnesses to this incident, or anyone with information, should call Northamptonshire Police on 101 - alternatively, information can be given anonymously to Crimestoppers on 0800 555 111.