An 81-year-old man was robbed and assaulted as he walked along a Wellingborough street.
The man was walking along Midland Road at about 9.45pm on Tuesday, December 8, when he was attacked.
He was approached from behind by three men, one of whom punched him in the head.
Another man then held him while one of the others stole his wallet, which contained cash.
The elderly man suffered cuts to his face and an injured shoulder as a result of the attack.
Following the assault, the thieves ran away towards Winstanley Road.
Witnesses, or anyone who knows anything about the incident, can call Northamptonshire Police on 101 or Crimestoppers anonymously on 0800 555111.