South Wales Police has released this video, which shows officers raiding houses in Cardiff, to arrest suspected drug dealers.
Detective Chief Inspector Tony Brown says Operation Foxtrot means "taking drugs off the street, putting the dealers in prison, cleaning areas where drugs deals have taken place, and providing support to drug users."
The operation was run by the police, Cardiff Council and Cardiff & Vale University Health Board, with support being offered for drug users.
More top news
But clear skies remain in the south and west
Joshua Davies says he was running away from a gang when he fell from the fifty-foot bridge.
First Minister's Questions: the new term begins