Cannabis worth an estimated £1million has been found growing on three floors of a former nightclub in the centre of Porth.
South Wales Police officers executed a drugs warrant at the old Apollo building on Aberhondda Road just before 10 o'clock this morning, where they discovered more than 1,000 cannabis plants.
The first floor was used as a nursery for newly-potted plants, and the ground and second floor were being used for plants at mid to late stages of growth.
Mature plants discovered on the top floor were 'perhaps days' away from being sold on Rhondda's streets, police said.
In an operation described by police as 'sophisticated', 200 and 600 watt light bulbs and extractor fans were being used, which would have demanded enough electricity to power three streets of terraced houses.