A crackdown on drug-dealing and associated violent crime in Norwich called Operation Gravity has brought 33 arrests.
Raids were made during the week-long operation on 17 properties in Orchard Street, Cromer Road, Gentry Place, Penn Grove, Wellington Green, Reepham Road, Northumberland Street, Magdalen Street, Spindle Road, Seaman Tower, Woodside Road and Barnards Yard.
Police also raided properties in Poll Close in Wymondham, Fakenham Road in Great Witchingham and Atkinson Close, Costessey.
Large quantities of Class A drugs have been seized, along with cash, knives and mobile phones, police said.
A total of 31 people were arrested in Norfolk and 21 of those have since been charged with offences related to the supply of Class A drugs. In London two men were arrested and charged with similar offences.