Police have made an appeal for information after gang robbed a man late on Saturday night in Rushden.
The 20-year-old was approached from behind by a group of six men, who assaulted him, at about midnight.
The victim, who suffered a possible broken nose and also received cuts and grazes to his head during the attack, also had his black iPhone taken.
The suspects then fled along Park Road towards the town centre.
Witnesses to the incident, or anyone with information, should call Northamptonshire Police on 101, or call Crimestoppers anonymously on 0800 555 111.