A 24-year-old man was robbed by two men who punched him in the head and the chest.
The victim suffered extensive swelling to his eyes, cheeks and lips. and the offenders stole his bags, phone, money and keys.
The incident happened in Abington Street, Northampton, near to Marks & Spencer, at around 1.10am on Tuesday, July 3.
Following the incident, the victim pursued the offenders who then attacked him again on Wellington Street near to Embargo night club.
The robber were white and in their 20s.
Witnesses, or anyone with information, can call Northamptonshire Police on 101 - alternatively, information can be given anonymously to Crimestoppers on 0800 555 111.