An uninsured car led police to arrest four people on suspicion of dealing class A drugs.
Officers spotted the car in Sutton-in-Ashfield on Thursday afternoon and began following it at a discrete distance.
The car was eventually stopped outside an address in Mansfield Road, at which point officers noticed a strong smell of cannabis coming from inside.
The vehicle and the two men inside were searched and various items were uncovered, including a burner style mobile phone and a quantity of cash.
Two men, aged 34 and 28, were arrested on suspicion of being concerned in the supply of class A drugs.
A subsequent search of the address in Mansfield Road led to the discovery of digital scales, deal bags, and additional intelligence relating to potential drug-related offending.
A 35-year-old woman and a 23-year-old man who were inside the property were also arrested on suspicion of being concerned in the supply of class A drugs.
All four have been released under investigation.
Inspector Mark Dickson, district commander for Mansfield, said: “Uninsured vehicles to tend arouse officers’ suspicions as they can often lead to the discovery of additional offences. In this instance, their initial concerns were well founded and a great bit of police work led them to arrest four suspects on suspicion of very serious offences.
“Drugs are a blight on our communities and fuel a great deal of additional offences – from thefts and burglaries to incidents of extreme violence. We will not tolerate drug dealing in Ashfield and are working tirelessly to clamp down on suspected offenders. As a result we’re executing more warrants, stopping more vehicles and searching more suspects on our streets.”