Four people were arrested after officers stopped a car in Rushden and went on to search a number of properties in the town.
Officers stopped a vehicle in Rushden on Wednesday (April 4) night and arrested three men.
A police spokesman added: “Their arrest led to a search of a couple of properties and the further arrest of a woman.
“A 48-year-old man has been charged with producing Class B drugs.
“The others have been released under investigation.”
One of the properties searched was in the Station Road area of Rushden.
PCSO Simon Arthur posted a message on the force’s neighbourhood alert system about the incident, which said: “As a result of some proactive work by our force proactive team and local intelligence they stopped a vehicle in Rushden linked to drugs.”
And his message concluded: “This is a great result dealing with our drug priority on our area.”