In connection with the supply of drugs in Wirral and St. Helens, the police have confiscated doors in 15 houses.
Raids in Merseyside and North Wales led to 10 arrests for a massive drug ring in the North West.
Police broke down doors in 15 houses and uncovered a stolen car, drugs and cash.
A further nine arrest warrants were executed by North Wales police officers in the Blaenau Ffestiniog area on Thursday and Friday.
During these raids four people were arrested and a stolen vehicle was confiscated.
Six arrest warrants were executed by Merseyside Police in the Wirral area on Thursday.
The investigation had previously identified and seized two cannabis factories in St Helens, with a total of over 100 factories, and seized Class A drugs and other paraphernalia from the drug trade.
Six people were arrested and a quantity of controlled drugs and class B cash was seized.
The warrants followed a seven-month investigation into the supply of drugs by County Lines, involving people from Merseyside and North Wales.
Four people were arrested for possession of Class A drugs and the manufacture of cannabis.
The four arrested were released as part of the investigation.
Detective Inspector Peter Stephenson of Merseyside Police said: “We remain committed to targeting those responsible for serious and organised crime, including drug supply.
“We have worked closely with our colleagues in the North Wales Police Service in this lengthy and ongoing investigation and I can assure the communities of Merseyside that the police will continue their fight against those involved in drug trafficking to make our neighbourhoods safer for all.
“I would also ask that people continue to provide information so that we can take further action.
said Inspector Lisa Jones of the North Wales Police Service: “I am delighted to have worked with our colleagues in Merseyside to break an established drug supply network in our area.
“I am determined to target the few causing the most damage by bringing drugs into our communities from outside the North Wales area”.