One man was taken to hospital this morning (Tuesday) following an incident inside a house in the Queens Park area of town.
Police were called at 6.25am to a property in Balfour Road following reports of an altercation.
Ambulance crews were also in attendance.
A spokesman for Northamptonshire Police said: "Two people were fighting and one man was taken to Northampton General Hospital.
"It is not thought his injuries are life threatening or life changing at the moment."