The offender is described as a black man, around 6ft tall and of skinny build. He was wearing a black hooded top with the hood up and black tracksuit bottoms. The victim was also a black man and was wearing a high visibility tabard, black tracksuit bottoms and black safety boots when he was attacked. Investigating officer Detective Sergeant Luke Grove, based at Milton Keynes police station, said: “I am appealing to anybody who was in the area of Kingston shopping centre this morning and witnessed this incident to please get in touch with police. “I am particularly keen to hear from anyone who has dash-cam or CCTV to please check this and contact us if it has captured anything that can assist this investigation.