Four people were arrested last week after a warrant was carried out in Grimsby.
Officers conducted a misuse of drugs act warrant at a property on Bonby Grove, Grimsby and upon entering are thought to have discovered what is believed to be an estimated £20k worth of crack cocaine and heroin.
An 18-year-old man, a 26-year-old woman, a 15-year-old girl and a 17-year-old boy were arrested on suspicion of being concerned in the supply of Class A drugs.
They have all since been released under investigation whilst officers continue with lines of enquiry.
