Armed officers were called after reports of a man being in possession of a firearm and making threats.
Police were called to an address in Western Way, Wellingborough, at 12.20pm today.
Police officers, including armed response officers, and the police helicopter attended the address.
A cordon was put in place and officers went into the property and found a man who has been taken to hospital for treatment.
No weapons have been found at the address and no shots were fired.
A police spokesman said: “This was a fast-moving incident and I would like to thank people who were disrupted during our operation for their patience.”