A gang threatened a homeless man in Kettering with a weapon in an attempt to rob him.
The incident took place in Gold Street between 9.30pm and 10pm on Monday, September 17.
A report made to police said three men approached a homeless man who was using his mobile phone.
They threatened him with a weapon, although it is not yet clear what the weapon was, in order to take the phone.
The victim refused and they ran off.
A police spokesman said their investigation was ongoing and urged witnesses to contact them on 101 or Crimestoppers anonymously on 0800 555111.