Police officers carrying out a routine enquiry discovered a stash of drugs worth between £15,000 and £30,000 in Lincoln.
Officers had been attending a property on Clarendon Gardens in the Lincoln Ermine estate when the discovery of ‘Psychoactive Substances’ was made.
The drugs hoard, weighing approximately 4kg, was found after officers began conducting a search following an arrest.
As a result, four people were arrested under suspicion of possession with intent to supply.
They have now been released under investigation, Lincolnshire Police confirmed.
Anyone with information about distribution of illegal substances should call 101.