130 police officers today seized £3.5m worth of cannabis and £400,000 in cash in raids that took place across south Wales and the west of England.
Eight people were arrested - five from Wales - in the raids which took place this morning at 10 addresses in Cardiff, Newport, Bath and Bristol. In the Eastgate Business Park in Cardiff a large cannabis factory was found and has since been dismantled.
South Wales Police officers were joined by colleagues from Gwent Police, Avon and Somerset Police, as well as staff from the UK Border Agency, Fire and Ambulance services.
Detective Inspector Paul Latham, who led the operation, said: "Operation Pristina was put in place to target individuals believed to be involved in the cultivation and supply of cannabis across South Wales and the west of England.
"During the course of this operation we have successfully disrupted many of those who have been suspected of dealing in drugs.
"This demonstrates the close partnership working with our colleagues on both sides of the River Severn to tackle drugs."
Operation Pristina was launched in October 2010 and has led to 26 properties being searched.
After the properties were searched, PCSOs delivered leaflets to neighbouring homes advising local householders of the police activity.