A 24 year-old man is being questioned following a drugs raid in Cardiff Bay.
Armed police accompanied neighbourhood officers during the search at an address on Burt Street on Thursday.
Around £600 worth of class A drugs was seized, after detectives received intelligence about anti-social behaviour and drug misuse at the property.
The suspect, arrested on suspicion of possessing Class A drugs with intent to supply, remains in custody.
According to South Wales Police, the raid was carried out as part of an ongoing campaign.
Inspector Abi Biddle said: "Drug dealing and misuse will not be tolerated. The Project Pinpoint campaign is about encouraging communities to report any behaviour they find troubling so we can gather vital intelligence that allows us to take appropriate action."
"We will continue to act on information received from members of the public accordingly."

Post Office Seeks New Operator in Dinas Powys as Village Faces Loss of Its Last Branch
Gardening team praised after helping police clear fallen tree near St Brides Major
Specsavers calls on children in Barry to design Wales Deaf Rugby World Cup shirts
Whitmore High Named One of UK’s Best Workplaces for Development
Steel Signing Marks Major Milestone in St Richard Gwyn School Redevelopment
Two Rescues in Record Heat as Volunteer Teams Respond to Afternoon Emergencies
Police find evidence of a large-scale cannabis cultivation at Riverside Place property fire
Network Rail confirm closure of Brookside level crossing in Dinas Powys
Police given powers to ask people to leave Comeston Lakes Country Park
Planned children’s role play centre could be given the go-ahead by Vale Council
Marie Curie Garden Fayre deemed huge success
Council seeks views on Future of Colcot Sports Centre and Buttrills Playing Fields
First Minister quizzed on further devolution, budget decisions, and misinformation in FMQs
Extreme heat leads to changes to services and closures
Severe Heat Warning Set to Disrupt Rail Travel Across South Wales This Week
Communities asked to support older people across Wales during severe heat warning
Caribbean Community Wales Brings Wales‑Wide Launch to Barry This Weekend
Community Award winner calls for sanitary bins in men’s toilets after living with prostate‑cancer‑related incontinence
Cardiff Airport Backs Holiday Safety Campaign Honouring Rhoose Teenager Tom Channon