A 14-year-old boy who was pushed and punched in the stomach managed to fight off his attacker who was trying to rob him.
The victim was walking along the pathway between Melrose Avenue and Watling Street near the railway bridge in Bletchley at 4pm on Monday.
A man, who was leaning on a fence, attacked the victim who fell to the ground.
The offender then tried to grab his wallet from his shirt pocket, tearing the fabric in the process.
The boy kicked out and his attacker ran off heading towards the H8.
The offender is a white man, around 24-years-old with messy short black hair.
He had two black hoops pierced above his right eye and wore a black hooded top with a white logo on the left hand side which looked like a panther.
He wore dark coloured tracksuit bottoms with a white Nike tick at the top of the left leg and black Nike trainers with a pink Nike tick on them.
If you have any information about the robbery, contact Det Con Samantha Reynolds on 101.