A man had his mobile phone cars keys and wallet stolen when he was mugged by a gang of youths in Sheffield city centre.
The culprits ambushed him close to the rear of Atkinsons on Charter Row between 2am and 2.30am on Sunday.
Police were told four or five youths were responsible for the mugging.
They were last seen running off up Bowdon Street or Fitzwilliam Street.
All were wearing dark clothing, including jackets, at the time.
Police officers investigating the incident sealed off the crime scene with tape for most of Sunday while they carried out inquiries.
Anyone with information about the mugging should call South Yorkshire Police on 101, quoting 156 of March 1 or Crimestoppers, anonymously, on 0800 555111.