Ten kilograms of class A drugs were discovered after authorities intercepted and searched a package at an airport.
Border Force colleagues made the discovery after the parcel came into Heathrow Airport, and once they learned it was destined for Nottinghamshire, local officers were on the case.
A search was then conducted at a property in Carlton Hill, Carlton, and officers recovered a quantity class A drugs and cash.
A 33-year-old man was arrested on suspicion of importing class A drugs and possession with intent to supply class A drugs.
Detective Inspector Mike Ebbins, from Nottinghamshire Police, said: “We work really well with our partners overseeing the borders and when there is intelligence suggesting that imported drugs are headed for Nottinghamshire we act on this.
“Drugs can have a serious impact on our communities and they can be linked to wider and serious organised criminality.
“Our proactive work, both in Nottinghamshire and linking in with our border agencies, means we can be one step ahead and stop any such activity in its tracks. As a result of this, a quantity of class A has been recovered and is out of circulation, and a man has been arrested.
“We continue to make enquiries and would encourage anyone with information or concerns about criminal activity in their areas to call Nottinghamshire Police on 101.”