An elderly man was confronted by two strangers who forced their way into his home.
At about 8pm on Wednesday January 13, the men knocked on the door of a house in Appletree Road, Chipping Warden, and forced their way inside.
They then grabbed the elderly resident by the throat and pushed him against a wall before telling him to sit down.
But they fled without taking anything from the property.
Both men wore dark clothing and it is believed they were both under 20 years old.
One had a hood covering his head and face and the other wore a balaclava.
Witnesses, or anyone who knows anything about this incident, can call Northamptonshire Police on 101.
Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111 or use the anonymous online form at www.crimestoppers-uk.org.