Police in Preston arrested five more people and seized £50,000 in cash as part of a crackdown on those with suspected links to crime gangs under Operation Nemesis.
Warrants were executed on Tuesday at addresses on Raikes Road, Marsh Lane, Ribbleton Lane and St Thomas Road.
Three men, aged 24, 27 and 29, all from Preston, were arrested on suspicion of supplying heroin.
A 53-year-old man from Preston was also arrested on suspicion of supplying heroin as well as being concerned in the supply of heroin.
A 47-year-old woman from Preston was arrested on suspicion of being concerned in the supply of heroin.
All five were in police custody.
The £50,000 pounds was recovered along with a quantity of what is believed to be class A drugs as well as drugs paraphernalia.
Four people, from Preston, arrested under Operation Nemesis on Monday have since been charged with various drugs offences.
Dilbag Singh, 32, of St Paul’s Road, Deepdale, was charged with three counts of supplying crack cocaine and possessing cannabis with intent to supply.
Tyler Stevens, 21, of Fishwick Parade was charged with two counts of supplying crack cocaine, four counts of supplying heroin and possessing cannabis.
Daniel Edmondson, 23, of Villiers Street, Plungington, was charged with supplying heroin and possessing heroin.
Christine Logan, 31, of Villiers Street was charged with four counts of being concerned in the supply of heroin and being concerned in the supply of cocaine.
All four appeared at Preston Magistrates Court on Tuesday, and three of the cases were referred to Crown Court.
A 63-year-old man from Preston who was arrested on suspicion of possessing heroin with intent to supply and being concerned in the supply of heroin has been bailed until August 20.
A 32-year-old woman from Preston who was arrested on suspicion of possessing heroin and a 13 year old boy who was arrested on suspicion of possessing cannabis have both been bailed until October 20.
Det Insp Warren Atkinson said: “We hope this continued activity will send out a strong message in terms of our commitment to tackling this type of crime.”