Cambridgeshire Police discovered class A drugs during a raid in Whittlesey on Monday.
Neighbourhood teams carried out the warrant at a property in Burdett Grove on July 22, following concerns of drug use and dealing.
Suspected class A drugs along with drug paraphernalia were found at the address.
A spokesperson for Cambridgeshire Constabulary said: "A man in his 30s was arrested on suspicion of being concerned in the supply of class A drugs.
"He spent the evening with us in custody and has been bailed to return to Thorpe Wood Police Station in October while we continue with enquiries."
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