A man was attacked by two men while walking his dog at a disused airfield near Desborough.
The incident happened on Tuesday, July 8, at about 5.45pm.
The man was walking his dog on the aerodrome, near to the Stoke Albany end, when two men in a blue Ford Transit van, which had a yellow bonnet, pulled up alongside him and asked for directions.
While the dog walker was giving the directions, the men got out of the van. One of them grabbed the victim and the other hit him in the face.
The victim’s dog was trying to bite the men as the attack continued and the driver pulled out a knife. The victim received superficial cuts. The offenders then got back into the van and drove away.
The offenders are described as white, aged in their early 20s, with Irish accents.
One of the men had black hair, shaved at the back and sides. He was about 5ft 7in, with a stocky build and was wearing a white vest top and blue jeans.
The second man also had black hair, which was longer at the back and shaped in a ‘V’. He was about 5ft 6in, with a slim build, and was wearing a black T-shirt.
Witnesses, or anyone with any information, are asked to contact Northamptonshire Police on 101. Alternatively, information can be given anonymously to Crimestoppers on 0800 555 111.