South Wales Police say anyone caught spraying or writing graffiti "will be dealt with efficiently and appropriately".
Over the last two or three months, the tag SPEC has been sprayed on property across Ely and Canton.
This was a concern to the community and we are glad that the person responsible has apologised and agreed to clean up the damage.
Graffiti is criminal damage, which can affect quality of life, increase fear of crime in some areas and reduce pride in a community. This will not be tolerated.
More top news
Llanelli Scarlets will take on Glasgow Warriors this evening in the first match of the Pro12 campaign.
There'll be a few showers in the south overnight, but these will clear by the morning to leave a decent start to the weekend!
Thousands are expected to attend the arts and music festival, which is now in its fourth year.