A neighbour challenged a group of three teenagers seen trying to break into the home of an elderly man in Briar Hill.
Three males, believed to be in their late teens, were seen trying to break into the house in Arrow Head Road on Saturday between 5.30 and 5.50pm.
They ran off when they were challenged by a neighbour.
Witnesses or anyone with information is asked to call Northamptonshire Police on 101.
Alternatively, call Crimestoppers anonymously on 0800 555 111.