Armed police were called to a home in Corby after reports that a man with a knife had let himself in and demanded to sell drugs from the address.
Officers attended the house in Oakley Road, near Patrick Road, after the incident at about midday yesterday (Sunday).
Armed officers and a dog unit were at the scene before an 18-year-old man was arrested.
A police spokesman said the man was arrested on suspicion of possessing an offensive weapon and possession with intent to supply class A drugs.
The spokesman added that he had since been released on bail pending further enquiries.